v0.11.5

Update Lua::set_memory_category doc
(CI) Update wasi/wasmtime
2026-06-08 16:05:43 +00:00 · 2025-11-22 16:13:08 +00:00 · 2025-11-22 14:27:02 +00:00 · 2025-11-22 13:58:15 +00:00 · 2025-11-22 13:57:04 +00:00 · 2025-11-22 13:55:07 +00:00
56 changed files with 1703 additions and 491 deletions
@@ -14,7 +14,7 @@ jobs:
          - os: ubuntu-latest
            target: x86_64-unknown-linux-gnu
          - os: macos-latest
-            target: x86_64-apple-darwin
+            target: aarch64-apple-darwin
          - os: windows-latest
            target: x86_64-pc-windows-msvc
    steps:
@@ -110,7 +110,7 @@ jobs:
          - os: ubuntu-latest
            target: x86_64-unknown-linux-gnu
          - os: macos-latest
-            target: x86_64-apple-darwin
+            target: aarch64-apple-darwin
          - os: windows-latest
            target: x86_64-pc-windows-msvc
    steps:
@@ -199,7 +199,7 @@ jobs:
          - os: ubuntu-latest
            target: x86_64-unknown-linux-gnu
          - os: macos-latest
-            target: x86_64-apple-darwin
+            target: aarch64-apple-darwin
    steps:
      - uses: actions/checkout@main
      - uses: dtolnay/rust-toolchain@stable
@@ -256,6 +256,41 @@ jobs:
          cargo test --tests --features "${{ matrix.lua }},vendored"
          cargo test --tests --features "${{ matrix.lua }},vendored,async,serde,macros,anyhow,userdata-wrappers"

+  test_wasm32_wasip2:
+    name: Test on wasm32-wasip2
+    runs-on: ubuntu-latest
+    needs: build
+    strategy:
+      matrix:
+        lua: [lua54, lua53, lua52, lua51]
+    steps:
+      - uses: actions/checkout@main
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          toolchain: nightly-2025-10-02
+          target: wasm32-wasip2
+      - name: Install wasi-sdk/Wasmtime
+        working-directory: ${{ runner.tool_cache }}
+        run: |
+          wasi_sdk=29
+          wasmtime=v39.0.0
+
+          curl -LO https://github.com/WebAssembly/wasi-sdk/releases/download/wasi-sdk-$wasi_sdk/wasi-sdk-$wasi_sdk.0-x86_64-linux.tar.gz
+          tar xf wasi-sdk-$wasi_sdk.0-x86_64-linux.tar.gz
+          WASI_SDK_PATH=`pwd`/wasi-sdk-$wasi_sdk.0-x86_64-linux
+          echo "WASI_SDK_PATH=$WASI_SDK_PATH" >> $GITHUB_ENV
+          echo "CC_wasm32_wasip2=$WASI_SDK_PATH/bin/clang" >> $GITHUB_ENV
+          echo "CARGO_TARGET_WASM32_WASIP2_LINKER=$WASI_SDK_PATH/bin/clang" >> $GITHUB_ENV
+          echo "CARGO_TARGET_WASM32_WASIP2_RUSTFLAGS=-Clink-arg=-Wl,--export=cabi_realloc" >> $GITHUB_ENV
+
+          curl -LO https://github.com/bytecodealliance/wasmtime/releases/download/$wasmtime/wasmtime-$wasmtime-x86_64-linux.tar.xz
+          tar xf wasmtime-$wasmtime-x86_64-linux.tar.xz
+          echo "CARGO_TARGET_WASM32_WASIP2_RUNNER=`pwd`/wasmtime-$wasmtime-x86_64-linux/wasmtime -W exceptions" >> $GITHUB_ENV
+      - name: Run ${{ matrix.lua }} tests
+        run: |
+          cargo test --target wasm32-wasip2 --tests --features "${{ matrix.lua }},vendored"
+          cargo test --target wasm32-wasip2 --tests --features "${{ matrix.lua }},vendored,serde,macros,anyhow,userdata-wrappers"
+
  rustfmt:
    name: Rustfmt
    runs-on: ubuntu-latest
@@ -1,3 +1,14 @@
+## v0.11.5 (Nov 22, 2025)
+
+- Luau updated to 0.701
+- Added `Lua::set_memory_category` and `Lua::heap_dump` functions to profile (Luau) memory
+- Added `Lua::type_metatable` helper to get metatable of a primitive type
+- Added `Lua::traceback` function to generate stack traces at different levels
+- Added `add_method_once` /`add_async_method_once` UserData methods (experimental)
+- Make `AnyUserData::type_name` public
+- impl `IntoLuaMulti` for `&MultiValue`
+- Bugfixes and async perf improvements
+
 ## v0.11.4 (Sep 29, 2025)

 - Make `Value::to_serializable` public
@@ -1,8 +1,8 @@
 [package]
 name = "mlua"
-version = "0.11.4" # remember to update mlua_derive
+version = "0.11.5" # remember to update mlua_derive
 authors = ["Aleksandr Orlenko <zxteam@pm.me>", "kyren <catherine@kyju.org>"]
-rust-version = "1.79.0"
+rust-version = "1.80.0"
 edition = "2021"
 repository = "https://github.com/mlua-rs/mlua"
 documentation = "https://docs.rs/mlua"
@@ -61,23 +61,24 @@ serde-value = { version = "0.7", optional = true }
 parking_lot = { version = "0.12", features = ["arc_lock"] }
 anyhow = { version = "1.0", optional = true }
 rustversion = "1.0"
+libc = "0.2"

-ffi = { package = "mlua-sys", version = "0.8.3", path = "mlua-sys" }
+ffi = { package = "mlua-sys", version = "0.9.0", path = "mlua-sys" }

 [dev-dependencies]
 trybuild = "1.0"
-hyper = { version = "1.2", features = ["full"] }
-hyper-util = { version = "0.1.3", features = ["full"] }
-http-body-util = "0.1.1"
-reqwest = { version = "0.12", features = ["json"] }
 tokio = { version = "1.0", features = ["macros", "rt", "time"] }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = { version = "1.0", features = ["arbitrary_precision"] }
 maplit = "1.0"
-tempfile = "3"
 static_assertions = "1.0"

-[target.'cfg(not(target_arch = "wasm32"))'.dev-dependencies]
+[target.'cfg(not(target_family = "wasm"))'.dev-dependencies]
+hyper = { version = "1.2", features = ["full"] }
+hyper-util = { version = "0.1.3", features = ["full"] }
+http-body-util = "0.1.1"
+reqwest = { version = "0.12", features = ["json"] }
+tempfile = "3"
 criterion = { version = "0.7", features = ["async_tokio"] }
 rustyline = "17.0"
 tokio = { version = "1.0", features = ["full"] }
@@ -1,6 +1,6 @@
 [package]
 name = "mlua-sys"
-version = "0.8.3"
+version = "0.9.0"
 authors = ["Aleksandr Orlenko <zxteam@pm.me>"]
 rust-version = "1.71"
 edition = "2021"
@@ -41,7 +41,7 @@ cfg-if = "1.0"
 pkg-config = "0.3.17"
 lua-src = { version = ">= 548.1.0, < 548.2.0", optional = true }
 luajit-src = { version = ">= 210.6.0, < 210.7.0", optional = true }
-luau0-src = { version = "0.15.6", optional = true }
+luau0-src = { version = "0.17.0", optional = true }

 [lints.rust]
 unexpected_cfgs = { level = "allow", check-cfg = ['cfg(raw_dylib)'] }
@@ -2,6 +2,7 @@
 //!
 //! Based on github.com/keplerproject/lua-compat-5.3

+use std::ffi::CStr;
 use std::os::raw::{c_char, c_int, c_void};
 use std::{mem, ptr};

@@ -20,8 +21,8 @@ unsafe fn compat53_reverse(L: *mut lua_State, mut a: c_int, mut b: c_int) {
    }
 }

-const COMPAT53_LEVELS1: c_int = 12; // size of the first part of the stack
-const COMPAT53_LEVELS2: c_int = 10; // size of the second part of the stack
+const COMPAT53_LEVELS1: c_int = 10; // size of the first part of the stack
+const COMPAT53_LEVELS2: c_int = 11; // size of the second part of the stack

 unsafe fn compat53_countlevels(L: *mut lua_State) -> c_int {
    let mut ar: lua_Debug = mem::zeroed();
@@ -88,11 +89,10 @@ unsafe fn compat53_findfield(L: *mut lua_State, objidx: c_int, level: c_int) ->
                lua_pop(L, 1); // remove value (but keep name)
                return 1;
            } else if compat53_findfield(L, objidx, level - 1) != 0 {
-                // try recursively
-                lua_remove(L, -2); // remove table (but keep name)
-                lua_pushliteral(L, c".");
-                lua_insert(L, -2); // place '.' between the two names
-                lua_concat(L, 3);
+                // stack: lib_name, lib_table, field_name (top)
+                lua_pushliteral(L, c"."); // place '.' between the two names
+                lua_replace(L, -3); // (in the slot occupied by table)
+                lua_concat(L, 3); // lib_name.field_name
                return 1;
            }
        }
@@ -101,13 +101,20 @@ unsafe fn compat53_findfield(L: *mut lua_State, objidx: c_int, level: c_int) ->
    0 // not found
 }

-unsafe fn compat53_pushglobalfuncname(L: *mut lua_State, ar: *mut lua_Debug) -> c_int {
+unsafe fn compat53_pushglobalfuncname(L: *mut lua_State, L1: *mut lua_State, ar: *mut lua_Debug) -> c_int {
    let top = lua_gettop(L);
-    lua_getinfo(L, cstr!("f"), ar); // push function
+    lua_getinfo(L1, cstr!("f"), ar); // push function
+    lua_xmove(L1, L, 1); // and move onto L
    lua_pushvalue(L, LUA_GLOBALSINDEX);
+    luaL_checkstack(L, 6, cstr!("not enough stack")); // slots for 'findfield'
    if compat53_findfield(L, top + 1, 2) != 0 {
+        let name = lua_tostring(L, -1);
+        if CStr::from_ptr(name).to_bytes().starts_with(b"_G.") {
+            lua_pushstring(L, name.add(3)); // push name without prefix
+            lua_remove(L, -2); // remove original name
+        }
        lua_copy(L, -1, top + 1); // move name to proper place
-        lua_pop(L, 2); // remove pushed values
+        lua_settop(L, top + 1); // remove pushed values
        1
    } else {
        lua_settop(L, top); // remove function and global table
@@ -115,27 +122,23 @@ unsafe fn compat53_pushglobalfuncname(L: *mut lua_State, ar: *mut lua_Debug) ->
    }
 }

-unsafe fn compat53_pushfuncname(L: *mut lua_State, ar: *mut lua_Debug) {
-    if *(*ar).namewhat != b'\0' as c_char {
-        // is there a name?
-        lua_pushfstring(L, cstr!("function '%s'"), (*ar).name);
+unsafe fn compat53_pushfuncname(L: *mut lua_State, L1: *mut lua_State, ar: *mut lua_Debug) {
+    // try first a global name
+    if compat53_pushglobalfuncname(L, L1, ar) != 0 {
+        lua_pushfstring(L, cstr!("function '%s'"), lua_tostring(L, -1));
+        lua_remove(L, -2); // remove name
+    } else if *(*ar).namewhat != b'\0' as c_char {
+        // use name from code
+        lua_pushfstring(L, cstr!("%s '%s'"), (*ar).namewhat, (*ar).name);
    } else if *(*ar).what == b'm' as c_char {
        // main?
        lua_pushliteral(L, c"main chunk");
-    } else if *(*ar).what == b'C' as c_char {
-        if compat53_pushglobalfuncname(L, ar) != 0 {
-            lua_pushfstring(L, cstr!("function '%s'"), lua_tostring(L, -1));
-            lua_remove(L, -2); // remove name
-        } else {
-            lua_pushliteral(L, c"?");
-        }
+    } else if *(*ar).what != b'C' as c_char {
+        // for Lua functions, use <file:line>
+        let short_src = (*ar).short_src.as_ptr();
+        lua_pushfstring(L, cstr!("function <%s:%d>"), short_src, (*ar).linedefined);
    } else {
-        lua_pushfstring(
-            L,
-            cstr!("function <%s:%d>"),
-            (*ar).short_src.as_ptr(),
-            (*ar).linedefined,
-        );
+        lua_pushliteral(L, c"?");
    }
 }

@@ -459,32 +462,36 @@ pub unsafe fn luaL_traceback(L: *mut lua_State, L1: *mut lua_State, msg: *const
    let mut ar: lua_Debug = mem::zeroed();
    let top = lua_gettop(L);
    let numlevels = compat53_countlevels(L1);
-    let mark = if numlevels > COMPAT53_LEVELS1 + COMPAT53_LEVELS2 {
-        COMPAT53_LEVELS1
-    } else {
-        0
-    };
+    #[rustfmt::skip]
+    let mut limit = if numlevels - level > COMPAT53_LEVELS1 + COMPAT53_LEVELS2 { COMPAT53_LEVELS1 } else { -1 };

    if !msg.is_null() {
        lua_pushfstring(L, cstr!("%s\n"), msg);
    }
    lua_pushliteral(L, c"stack traceback:");
    while lua_getstack(L1, level, &mut ar) != 0 {
-        level += 1;
-        if level == mark {
+        if limit == 0 {
            // too many levels?
-            lua_pushliteral(L, c"\n\t..."); // add a '...'
-            level = numlevels - COMPAT53_LEVELS2; // and skip to last ones
+            let n = numlevels - level - COMPAT53_LEVELS2;
+            // add warning about skip ("n + 1" because we skip current level too)
+            lua_pushfstring(L, cstr!("\n\t...\t(skipping %d levels)"), n + 1); // add warning about skip
+            level += n; // and skip to last levels
        } else {
-            lua_getinfo(L1, cstr!("Slnt"), &mut ar);
-            lua_pushfstring(L, cstr!("\n\t%s:"), ar.short_src.as_ptr());
-            if ar.currentline > 0 {
-                lua_pushfstring(L, cstr!("%d:"), ar.currentline);
+            lua_getinfo(L1, cstr!("Sln"), &mut ar);
+            if *ar.what != b't' as c_char {
+                if ar.currentline <= 0 {
+                    lua_pushfstring(L, cstr!("\n\t%s: in "), ar.short_src.as_ptr());
+                } else {
+                    lua_pushfstring(L, cstr!("\n\t%s:%d: in "), ar.short_src.as_ptr(), ar.currentline);
+                }
+                compat53_pushfuncname(L, L1, &mut ar);
+                lua_concat(L, lua_gettop(L) - top);
+            } else {
+                lua_pushstring(L, cstr!("\n\t(...tail calls...)"));
            }
-            lua_pushliteral(L, c" in ");
-            compat53_pushfuncname(L, &mut ar);
-            lua_concat(L, lua_gettop(L) - top);
        }
+        level += 1;
+        limit -= 1;
    }
    lua_concat(L, lua_gettop(L) - top);
 }
@@ -23,8 +23,8 @@ unsafe fn compat53_reverse(L: *mut lua_State, mut a: c_int, mut b: c_int) {
    }
 }

-const COMPAT53_LEVELS1: c_int = 12; // size of the first part of the stack
-const COMPAT53_LEVELS2: c_int = 10; // size of the second part of the stack
+const COMPAT53_LEVELS1: c_int = 10; // size of the first part of the stack
+const COMPAT53_LEVELS2: c_int = 11; // size of the second part of the stack

 unsafe fn compat53_findfield(L: *mut lua_State, objidx: c_int, level: c_int) -> c_int {
    if level == 0 || lua_istable(L, -1) == 0 {
@@ -41,11 +41,10 @@ unsafe fn compat53_findfield(L: *mut lua_State, objidx: c_int, level: c_int) ->
                lua_pop(L, 1); // remove value (but keep name)
                return 1;
            } else if compat53_findfield(L, objidx, level - 1) != 0 {
-                // try recursively
-                lua_remove(L, -2); // remove table (but keep name)
-                lua_pushliteral(L, c".");
-                lua_insert(L, -2); // place '.' between the two names
-                lua_concat(L, 3);
+                // stack: lib_name, lib_table, field_name (top)
+                lua_pushliteral(L, c"."); // place '.' between the two names
+                lua_replace(L, -3); // (in the slot occupied by table)
+                lua_concat(L, 3); // lib_name.field_name
                return 1;
            }
        }
@@ -54,14 +53,25 @@ unsafe fn compat53_findfield(L: *mut lua_State, objidx: c_int, level: c_int) ->
    0 // not found
 }

-unsafe fn compat53_pushglobalfuncname(L: *mut lua_State, level: c_int, ar: *mut lua_Debug) -> c_int {
+unsafe fn compat53_pushglobalfuncname(
+    L: *mut lua_State,
+    L1: *mut lua_State,
+    level: c_int,
+    ar: *mut lua_Debug,
+) -> c_int {
    let top = lua_gettop(L);
-    // push function
-    lua_getinfo(L, level, cstr!("f"), ar);
+    lua_getinfo(L1, level, cstr!("f"), ar); // push function
+    lua_xmove(L1, L, 1); // and move onto L
    lua_pushvalue(L, LUA_GLOBALSINDEX);
+    luaL_checkstack(L, 6, cstr!("not enough stack")); // slots for 'findfield'
    if compat53_findfield(L, top + 1, 2) != 0 {
+        let name = lua_tostring(L, -1);
+        if CStr::from_ptr(name).to_bytes().starts_with(b"_G.") {
+            lua_pushstring(L, name.add(3)); // push name without prefix
+            lua_remove(L, -2); // remove original name
+        }
        lua_copy(L, -1, top + 1); // move name to proper place
-        lua_pop(L, 2); // remove pushed values
+        lua_settop(L, top + 1); // remove pushed values
        1
    } else {
        lua_settop(L, top); // remove function and global table
@@ -69,13 +79,16 @@ unsafe fn compat53_pushglobalfuncname(L: *mut lua_State, level: c_int, ar: *mut
    }
 }

-unsafe fn compat53_pushfuncname(L: *mut lua_State, level: c_int, ar: *mut lua_Debug) {
+unsafe fn compat53_pushfuncname(L: *mut lua_State, L1: *mut lua_State, level: c_int, ar: *mut lua_Debug) {
    if !(*ar).name.is_null() {
        // is there a name?
        lua_pushfstring(L, cstr!("function '%s'"), (*ar).name);
-    } else if compat53_pushglobalfuncname(L, level, ar) != 0 {
+    } else if compat53_pushglobalfuncname(L, L1, level, ar) != 0 {
        lua_pushfstring(L, cstr!("function '%s'"), lua_tostring(L, -1));
        lua_remove(L, -2); // remove name
+    } else if *(*ar).what != b'C' as c_char {
+        // for Lua functions, use <file:line>
+        lua_pushfstring(L, cstr!("function <%s:%d>"), (*ar).short_src, (*ar).linedefined);
    } else {
        lua_pushliteral(L, c"?");
    }
@@ -190,9 +203,7 @@ pub unsafe fn lua_rawgeti(L: *mut lua_State, idx: c_int, n: lua_Integer) -> c_in

 #[inline(always)]
 pub unsafe fn lua_rawgetp(L: *mut lua_State, idx: c_int, p: *const c_void) -> c_int {
-    let abs_i = lua_absindex(L, idx);
-    lua_pushlightuserdata(L, p as *mut c_void);
-    lua_rawget(L, abs_i)
+    lua_rawgetptagged(L, idx, p, 0)
 }

 #[inline(always)]
@@ -226,11 +237,7 @@ pub unsafe fn lua_rawseti(L: *mut lua_State, idx: c_int, n: lua_Integer) {

 #[inline(always)]
 pub unsafe fn lua_rawsetp(L: *mut lua_State, idx: c_int, p: *const c_void) {
-    let abs_i = lua_absindex(L, idx);
-    luaL_checkstack(L, 1, cstr!("not enough stack slots available"));
-    lua_pushlightuserdata(L, p as *mut c_void);
-    lua_insert(L, -2);
-    lua_rawset(L, abs_i);
+    lua_rawsetptagged(L, idx, p, 0)
 }

 #[inline(always)]
@@ -452,36 +459,42 @@ pub unsafe fn luaL_len(L: *mut lua_State, idx: c_int) -> lua_Integer {

 pub unsafe fn luaL_traceback(L: *mut lua_State, L1: *mut lua_State, msg: *const c_char, mut level: c_int) {
    let mut ar: lua_Debug = mem::zeroed();
-    let top = lua_gettop(L);
    let numlevels = lua_stackdepth(L);
-    let mark = if numlevels > COMPAT53_LEVELS1 + COMPAT53_LEVELS2 {
-        COMPAT53_LEVELS1
-    } else {
-        0
-    };
+    #[rustfmt::skip]
+    let mut limit = if numlevels - level > COMPAT53_LEVELS1 + COMPAT53_LEVELS2 { COMPAT53_LEVELS1 } else { -1 };
+
+    let mut buf: luaL_Strbuf = mem::zeroed();
+    luaL_buffinit(L, &mut buf);

    if !msg.is_null() {
-        lua_pushfstring(L, cstr!("%s\n"), msg);
+        luaL_addstring(&mut buf, msg);
+        luaL_addstring(&mut buf, cstr!("\n"));
    }
-    lua_pushliteral(L, c"stack traceback:");
-    while lua_getinfo(L1, level, cstr!(""), &mut ar) != 0 {
-        if level + 1 == mark {
+    luaL_addstring(&mut buf, cstr!("stack traceback:"));
+    while lua_getinfo(L1, level, cstr!("sln"), &mut ar) != 0 {
+        if limit == 0 {
            // too many levels?
-            lua_pushliteral(L, c"\n\t..."); // add a '...'
-            level = numlevels - COMPAT53_LEVELS2; // and skip to last ones
+            let n = numlevels - level - COMPAT53_LEVELS2;
+            // add warning about skip ("n + 1" because we skip current level too)
+            lua_pushfstring(L, cstr!("\n\t...\t(skipping %d levels)"), n + 1);
+            luaL_addvalue(&mut buf);
+            level += n; // and skip to last levels
        } else {
-            lua_getinfo(L1, level, cstr!("sln"), &mut ar);
-            lua_pushfstring(L, cstr!("\n\t%s:"), ar.short_src);
+            luaL_addstring(&mut buf, cstr!("\n\t"));
+            luaL_addstring(&mut buf, ar.short_src);
+            luaL_addstring(&mut buf, cstr!(":"));
            if ar.currentline > 0 {
-                lua_pushfstring(L, cstr!("%d:"), ar.currentline);
+                luaL_addunsigned(&mut buf, ar.currentline as _);
+                luaL_addstring(&mut buf, cstr!(":"));
            }
-            lua_pushliteral(L, c" in ");
-            compat53_pushfuncname(L, level, &mut ar);
-            lua_concat(L, lua_gettop(L) - top);
+            luaL_addstring(&mut buf, cstr!(" in "));
+            compat53_pushfuncname(L, L1, level, &mut ar);
+            luaL_addvalue(&mut buf);
        }
        level += 1;
+        limit -= 1;
    }
-    lua_concat(L, lua_gettop(L) - top);
+    luaL_pushresult(&mut buf);
 }

 pub unsafe fn luaL_tolstring(L: *mut lua_State, mut idx: c_int, len: *mut usize) -> *const c_char {
@@ -544,7 +557,7 @@ pub unsafe fn luaL_getsubtable(L: *mut lua_State, idx: c_int, fname: *const c_ch

 pub unsafe fn luaL_requiref(L: *mut lua_State, modname: *const c_char, openf: lua_CFunction, glb: c_int) {
    luaL_checkstack(L, 3, cstr!("not enough stack slots available"));
-    luaL_getsubtable(L, LUA_REGISTRYINDEX, cstr!("_LOADED"));
+    luaL_getsubtable(L, LUA_REGISTRYINDEX, LUA_LOADED_TABLE);
    if lua_getfield(L, -1, modname) == LUA_TNIL {
        lua_pop(L, 1);
        lua_pushcfunction(L, openf);
@@ -5,6 +5,9 @@ use std::ptr;

 use super::lua::{self, lua_CFunction, lua_Number, lua_State, lua_Unsigned, LUA_REGISTRYINDEX};

+// Key, in the registry, for table of loaded modules
+pub const LUA_LOADED_TABLE: *const c_char = cstr!("_LOADED");
+
 #[repr(C)]
 pub struct luaL_Reg {
    pub name: *const c_char,
@@ -209,3 +212,18 @@ pub unsafe fn luaL_addstring(B: *mut luaL_Strbuf, s: *const c_char) {
    }
    luaL_addlstring(B, s, len);
 }
+
+pub unsafe fn luaL_addunsigned(B: *mut luaL_Strbuf, mut n: lua_Unsigned) {
+    let mut buf: [c_char; 32] = [0; 32];
+    let mut i = 32;
+    loop {
+        i -= 1;
+        let digit = (n % 10) as u8;
+        buf[i] = (b'0' + digit) as c_char;
+        n /= 10;
+        if n == 0 {
+            break;
+        }
+    }
+    luaL_addlstring(B, buf.as_ptr().add(i), 32 - i);
+}
@@ -203,6 +203,7 @@ unsafe extern "C-unwind" {
    pub fn lua_rawget(L: *mut lua_State, idx: c_int) -> c_int;
    #[link_name = "lua_rawgeti"]
    pub fn lua_rawgeti_(L: *mut lua_State, idx: c_int, n: c_int) -> c_int;
+    pub fn lua_rawgetptagged(L: *mut lua_State, idx: c_int, p: *const c_void, tag: c_int) -> c_int;
    pub fn lua_createtable(L: *mut lua_State, narr: c_int, nrec: c_int);

    pub fn lua_setreadonly(L: *mut lua_State, idx: c_int, enabled: c_int);
@@ -220,6 +221,7 @@ unsafe extern "C-unwind" {
    pub fn lua_rawset(L: *mut lua_State, idx: c_int);
    #[link_name = "lua_rawseti"]
    pub fn lua_rawseti_(L: *mut lua_State, idx: c_int, n: c_int);
+    pub fn lua_rawsetptagged(L: *mut lua_State, idx: c_int, p: *const c_void, tag: c_int);
    pub fn lua_setmetatable(L: *mut lua_State, objindex: c_int) -> c_int;
    pub fn lua_setfenv(L: *mut lua_State, idx: c_int) -> c_int;

@@ -545,4 +547,9 @@ unsafe extern "C" {
 unsafe extern "C" {
    pub fn luau_setfflag(name: *const c_char, value: c_int) -> c_int;
    pub fn lua_getmetatablepointer(L: *mut lua_State, idx: c_int) -> *const c_void;
+    pub fn lua_gcdump(
+        L: *mut lua_State,
+        file: *mut c_void,
+        category_name: Option<unsafe extern "C" fn(L: *mut lua_State, memcat: u8) -> *const c_char>,
+    );
 }
@@ -23,6 +23,16 @@ pub enum luarequire_WriteResult {
    Failure,
 }

+/// Represents whether a configuration file is present, and if so, its syntax.
+#[repr(C)]
+pub enum luarequire_ConfigStatus {
+    Absent,
+    // Signals the presence of multiple configuration files
+    Ambiguous,
+    PresentJson,
+    PresentLuau,
+}
+
 #[repr(C)]
 pub struct luarequire_Configuration {
    // Returns whether requires are permitted from the given chunkname.
@@ -48,6 +58,17 @@ pub struct luarequire_Configuration {
        path: *const c_char,
    ) -> luarequire_NavigateResult,

+    // Provides a final override opportunity if an alias cannot be found in configuration files. If
+    // NAVIGATE_SUCCESS is returned, this must update the internal state to point at the aliased module.
+    // Can be left undefined.
+    pub to_alias_fallback: Option<
+        unsafe extern "C-unwind" fn(
+            L: *mut lua_State,
+            ctx: *mut c_void,
+            alias_unprefixed: *const c_char,
+        ) -> luarequire_NavigateResult,
+    >,
+
    // Navigates through the context by making mutations to the internal state.
    pub to_parent:
        unsafe extern "C-unwind" fn(L: *mut lua_State, ctx: *mut c_void) -> luarequire_NavigateResult,
@@ -90,13 +111,14 @@ pub struct luarequire_Configuration {
        size_out: *mut usize,
    ) -> luarequire_WriteResult,

-    // Returns whether a configuration file is present in the current context.
-    // If not, require-by-string will call to_parent until either a configuration file is present or
+    // Returns whether a configuration file is present in the current context, and if so, its syntax.
+    // If not present, require-by-string will call to_parent until either a configuration file is present or
    // NAVIGATE_FAILURE is returned (at root).
-    pub is_config_present: unsafe extern "C-unwind" fn(L: *mut lua_State, ctx: *mut c_void) -> bool,
+    pub get_config_status:
+        unsafe extern "C-unwind" fn(L: *mut lua_State, ctx: *mut c_void) -> luarequire_ConfigStatus,

    // Parses the configuration file in the current context for the given alias and returns its
-    // value or WRITE_FAILURE if not found. This function is only called if is_config_present
+    // value or WRITE_FAILURE if not found. This function is only called if get_config_status
    // returns true. If this function pointer is set, get_config must not be set. Opting in to this
    // function pointer disables parsing configuration files internally and can be used for finer
    // control over the configuration file parsing process.
@@ -111,9 +133,10 @@ pub struct luarequire_Configuration {
        ) -> luarequire_WriteResult,
    >,

-    // Provides the contents of the configuration file in the current context. This function is only called
-    // if is_config_present returns true. If this function pointer is set, get_alias must not be set. Opting
-    // in to this function pointer enables parsing configuration files internally.
+    // Provides the contents of the configuration file in the current context.
+    // This function is only called if get_config_status does not return CONFIG_ABSENT. If this function
+    // pointer is set, get_alias must not be set. Opting in to this function pointer enables parsing
+    // configuration files internally.
    pub get_config: Option<
        unsafe extern "C-unwind" fn(
            L: *mut lua_State,
@@ -124,6 +147,13 @@ pub struct luarequire_Configuration {
        ) -> luarequire_WriteResult,
    >,

+    // Returns the maximum number of milliseconds to allow for executing a given Luau-syntax configuration
+    // file. This function is only called if get_config_status returns CONFIG_PRESENT_LUAU and can be left
+    // undefined if support for Luau-syntax configuration files is not needed. A default value of 2000ms is
+    // used. Negative values are treated as infinite.
+    pub get_luau_config_timeout:
+        Option<unsafe extern "C-unwind" fn(L: *mut lua_State, ctx: *mut c_void) -> c_int>,
+
    // Executes the module and places the result on the stack. Returns the number of results placed on the
    // stack.
    // Returning -1 directs the requiring thread to yield. In this case, this thread should be resumed with
@@ -132,7 +132,7 @@ pub use crate::{
    buffer::Buffer,
    chunk::{CompileConstant, Compiler},
    function::CoverageInfo,
-    luau::{NavigateError, Require, TextRequirer},
+    luau::{HeapDump, NavigateError, Require, TextRequirer},
    vector::Vector,
 };

@@ -0,0 +1,178 @@
+use std::collections::HashMap;
+use std::hash::Hash;
+use std::mem;
+use std::os::raw::c_char;
+
+use crate::state::ExtraData;
+
+use super::json::{self, Json};
+
+/// Represents a heap dump of a Luau memory state.
+#[cfg(any(feature = "luau", doc))]
+#[cfg_attr(docsrs, doc(cfg(feature = "luau")))]
+pub struct HeapDump {
+    data: Json<'static>, // refers to the contents of `buf`
+    buf: Box<str>,
+}
+
+impl HeapDump {
+    /// Dumps the current Lua heap state.
+    pub(crate) unsafe fn new(state: *mut ffi::lua_State) -> Option<Self> {
+        unsafe extern "C" fn category_name(state: *mut ffi::lua_State, cat: u8) -> *const c_char {
+            (&*ExtraData::get(state))
+                .mem_categories
+                .get(cat as usize)
+                .map(|s| s.as_ptr())
+                .unwrap_or(cstr!("unknown"))
+        }
+
+        let mut buf = Vec::new();
+        unsafe {
+            let file = libc::tmpfile();
+            if file.is_null() {
+                return None;
+            }
+            ffi::lua_gcdump(state, file as *mut _, Some(category_name));
+            libc::fseek(file, 0, libc::SEEK_END);
+            let len = libc::ftell(file) as usize;
+            libc::rewind(file);
+            if len > 0 {
+                buf.reserve(len);
+                libc::fread(buf.as_mut_ptr() as *mut _, 1, len, file);
+                buf.set_len(len);
+            }
+            libc::fclose(file);
+        }
+
+        let buf = String::from_utf8(buf).ok()?.into_boxed_str();
+        let data = json::parse(unsafe { mem::transmute::<&str, &'static str>(&buf) }).ok()?;
+        Some(HeapDump { data, buf })
+    }
+
+    /// Returns the raw JSON representation of the heap dump.
+    ///
+    /// The JSON structure is an internal detail and may change in future versions.
+    #[doc(hidden)]
+    pub fn to_json(&self) -> &str {
+        &self.buf
+    }
+
+    /// Returns the total size of the Lua heap in bytes.
+    pub fn size(&self) -> u64 {
+        self.data["stats"]["size"].as_u64().unwrap_or_default()
+    }
+
+    /// Returns a mapping from object type to (count, total size in bytes).
+    ///
+    /// If `category` is provided, only objects in that category are considered.
+    pub fn size_by_type<'a>(&'a self, category: Option<&str>) -> HashMap<&'a str, (usize, u64)> {
+        self.size_by_type_inner(category).unwrap_or_default()
+    }
+
+    fn size_by_type_inner<'a>(&'a self, category: Option<&str>) -> Option<HashMap<&'a str, (usize, u64)>> {
+        let category_id = match category {
+            // If we cannot find the category, return empty result
+            Some(cat) => Some(self.find_category_id(cat)?),
+            None => None,
+        };
+
+        let mut size_by_type = HashMap::new();
+        let objects = self.data["objects"].as_object()?;
+        for obj in objects.values() {
+            if let Some(cat_id) = category_id {
+                if obj["cat"].as_i64()? != cat_id {
+                    continue;
+                }
+            }
+            update_size(&mut size_by_type, obj["type"].as_str()?, obj["size"].as_u64()?);
+        }
+        Some(size_by_type)
+    }
+
+    /// Returns a mapping from category name to total size in bytes.
+    pub fn size_by_category(&self) -> HashMap<&str, u64> {
+        let mut size_by_category = HashMap::new();
+        if let Some(categories) = self.data["stats"]["categories"].as_object() {
+            for cat in categories.values() {
+                if let Some(cat_name) = cat["name"].as_str() {
+                    size_by_category.insert(cat_name, cat["size"].as_u64().unwrap_or_default());
+                }
+            }
+        }
+        size_by_category
+    }
+
+    /// Returns a mapping from userdata type to (count, total size in bytes).
+    pub fn size_by_userdata<'a>(&'a self, category: Option<&str>) -> HashMap<&'a str, (usize, u64)> {
+        self.size_by_userdata_inner(category).unwrap_or_default()
+    }
+
+    fn size_by_userdata_inner<'a>(
+        &'a self,
+        category: Option<&str>,
+    ) -> Option<HashMap<&'a str, (usize, u64)>> {
+        let category_id = match category {
+            // If we cannot find the category, return empty result
+            Some(cat) => Some(self.find_category_id(cat)?),
+            None => None,
+        };
+
+        let mut size_by_userdata = HashMap::new();
+        let objects = self.data["objects"].as_object()?;
+        for obj in objects.values() {
+            if obj["type"] != "userdata" {
+                continue;
+            }
+            if let Some(cat_id) = category_id {
+                if obj["cat"].as_i64()? != cat_id {
+                    continue;
+                }
+            }
+
+            // Determine userdata type from metatable
+            let mut ud_type = "unknown";
+            if let Some(metatable_addr) = obj["metatable"].as_str() {
+                if let Some(t) = get_key(objects, &objects[metatable_addr], "__type") {
+                    ud_type = t;
+                }
+            }
+            update_size(&mut size_by_userdata, ud_type, obj["size"].as_u64()?);
+        }
+        Some(size_by_userdata)
+    }
+
+    /// Finds the category ID for a given category name.
+    fn find_category_id(&self, category: &str) -> Option<i64> {
+        let categories = self.data["stats"]["categories"].as_object()?;
+        for (cat_id, cat) in categories {
+            if cat["name"].as_str() == Some(category) {
+                return cat_id.parse().ok();
+            }
+        }
+        None
+    }
+}
+
+/// Updates the size mapping for a given key.
+fn update_size<K: Eq + Hash>(size_type: &mut HashMap<K, (usize, u64)>, key: K, size: u64) {
+    let (ref mut count, ref mut total_size) = size_type.entry(key).or_insert((0, 0));
+    *count += 1;
+    *total_size += size;
+}
+
+/// Retrieves the value associated with a given `key` from a Lua table `tbl`.
+fn get_key<'a>(objects: &'a HashMap<&'a str, Json>, tbl: &Json, key: &str) -> Option<&'a str> {
+    let pairs = tbl["pairs"].as_array()?;
+    for kv in pairs.chunks_exact(2) {
+        #[rustfmt::skip]
+        let (Some(key_addr), Some(val_addr)) = (kv[0].as_str(), kv[1].as_str()) else { continue; };
+        if objects[key_addr]["type"] == "string" && objects[key_addr]["data"].as_str() == Some(key) {
+            if objects[val_addr]["type"] == "string" {
+                return objects[val_addr]["data"].as_str();
+            } else {
+                break;
+            }
+        }
+    }
+    None
+}
@@ -0,0 +1,327 @@
+use std::array;
+use std::collections::HashMap;
+use std::iter::Peekable;
+use std::ops::Index;
+use std::str::CharIndices;
+
+// A simple JSON parser and representation.
+// This parser supports only a subset of JSON specification and is intended for Luau's use cases.
+
+#[derive(Debug, PartialEq)]
+pub(crate) enum Json<'a> {
+    Null,
+    Bool(bool),
+    Integer(i64),
+    Number(f64),
+    String(&'a str),
+    Array(Vec<Json<'a>>),
+    Object(HashMap<&'a str, Json<'a>>),
+}
+
+impl<'a> Index<&str> for Json<'a> {
+    type Output = Json<'a>;
+
+    fn index(&self, key: &str) -> &Self::Output {
+        match self {
+            Json::Object(map) => map.get(key).unwrap_or(&Json::Null),
+            _ => &Json::Null,
+        }
+    }
+}
+
+impl PartialEq<&str> for Json<'_> {
+    fn eq(&self, other: &&str) -> bool {
+        matches!(self, Json::String(s) if s == other)
+    }
+}
+
+impl<'a> Json<'a> {
+    pub(crate) fn as_str(&self) -> Option<&'a str> {
+        match self {
+            Json::String(s) => Some(s),
+            _ => None,
+        }
+    }
+
+    pub(crate) fn as_i64(&self) -> Option<i64> {
+        match self {
+            Json::Integer(i) => Some(*i),
+            Json::Number(n) if n.fract() == 0.0 => Some(*n as i64),
+            _ => None,
+        }
+    }
+
+    pub(crate) fn as_u64(&self) -> Option<u64> {
+        self.as_i64()
+            .and_then(|i| if i >= 0 { Some(i as u64) } else { None })
+    }
+
+    pub(crate) fn as_array(&self) -> Option<&[Json<'a>]> {
+        match self {
+            Json::Array(arr) => Some(arr),
+            _ => None,
+        }
+    }
+
+    pub(crate) fn as_object(&self) -> Option<&HashMap<&'a str, Json<'a>>> {
+        match self {
+            Json::Object(map) => Some(map),
+            _ => None,
+        }
+    }
+}
+
+pub(crate) fn parse<'a>(s: &'a str) -> Result<Json<'a>, &'static str> {
+    let s = s.trim_ascii();
+    let mut chars = s.char_indices().peekable();
+    let value = parse_value(s, &mut chars)?;
+    Ok(value)
+}
+
+fn parse_value<'a>(s: &'a str, chars: &mut Peekable<CharIndices>) -> Result<Json<'a>, &'static str> {
+    skip_whitespace(chars);
+    match chars.peek() {
+        Some((_, '{')) => parse_object(s, chars),
+        Some((_, '[')) => parse_array(s, chars),
+        Some((_, '"')) => parse_string(s, chars).map(Json::String),
+        Some((_, 't' | 'f')) => parse_bool(chars),
+        Some((_, 'n')) => parse_null(chars),
+        Some((_, '-' | '0'..='9')) => parse_number(chars),
+        Some(_) => Err("unexpected character"),
+        None => Err("unexpected end of input"),
+    }
+}
+
+fn parse_object<'a>(s: &'a str, chars: &mut Peekable<CharIndices>) -> Result<Json<'a>, &'static str> {
+    chars.next(); // consume '{'
+
+    let mut map = HashMap::new();
+    skip_whitespace(chars);
+    if matches!(chars.peek(), Some((_, '}'))) {
+        chars.next();
+        return Ok(Json::Object(map));
+    }
+    loop {
+        skip_whitespace(chars);
+        let key = parse_string(s, chars)?;
+        skip_whitespace(chars);
+        if !matches!(chars.next(), Some((_, ':'))) {
+            return Err("expected ':'");
+        }
+        let value = parse_value(s, chars)?;
+        map.insert(key, value);
+        skip_whitespace(chars);
+        match chars.next() {
+            Some((_, ',')) => continue,
+            Some((_, '}')) => break,
+            _ => return Err("expected ',' or '}'"),
+        }
+    }
+    Ok(Json::Object(map))
+}
+
+fn parse_array<'a>(s: &'a str, chars: &mut Peekable<CharIndices>) -> Result<Json<'a>, &'static str> {
+    chars.next(); // consume '['
+
+    let mut arr = Vec::new();
+    skip_whitespace(chars);
+    if matches!(chars.peek(), Some((_, ']'))) {
+        chars.next();
+        return Ok(Json::Array(arr));
+    }
+    loop {
+        skip_whitespace(chars);
+        arr.push(parse_value(s, chars)?);
+        skip_whitespace(chars);
+        match chars.next() {
+            Some((_, ',')) => continue,
+            Some((_, ']')) => return Ok(Json::Array(arr)),
+            _ => return Err("expected ',' or ']'"),
+        }
+    }
+}
+
+fn parse_string<'a>(s: &'a str, chars: &mut Peekable<CharIndices>) -> Result<&'a str, &'static str> {
+    if !matches!(chars.next(), Some((_, '"'))) {
+        return Err("expected string starting with '\"'");
+    }
+    let start = chars.peek().map(|(i, _)| *i).unwrap_or(0);
+    for (i, c) in chars {
+        if c == '"' {
+            return Ok(&s[start..i]);
+        }
+    }
+    Err("unterminated string")
+}
+
+fn parse_number(chars: &mut Peekable<CharIndices>) -> Result<Json<'static>, &'static str> {
+    let mut is_float = false;
+    let mut num = String::new();
+    while let Some((_, c @ ('0'..='9' | '-' | '.' | 'e' | 'E' | '+'))) = chars.peek() {
+        num.push(*c);
+        is_float = is_float || matches!(c, '.' | 'e' | 'E');
+        chars.next();
+    }
+    if !is_float {
+        let i = num.parse::<i64>().map_err(|_| "invalid integer")?;
+        return Ok(Json::Integer(i));
+    }
+    let n = num.parse::<f64>().map_err(|_| "invalid number")?;
+    Ok(Json::Number(n))
+}
+
+fn parse_bool(chars: &mut Peekable<CharIndices>) -> Result<Json<'static>, &'static str> {
+    let bool = next_chars(chars);
+    if bool == [Some('t'), Some('r'), Some('u'), Some('e')] {
+        return Ok(Json::Bool(true));
+    }
+    if bool == [Some('f'), Some('a'), Some('l'), Some('s')] && matches!(chars.next(), Some((_, 'e'))) {
+        return Ok(Json::Bool(false));
+    }
+    Err("invalid boolean literal")
+}
+
+fn parse_null(chars: &mut Peekable<CharIndices>) -> Result<Json<'static>, &'static str> {
+    if next_chars(chars) == [Some('n'), Some('u'), Some('l'), Some('l')] {
+        return Ok(Json::Null);
+    }
+    Err("invalid \"null\" literal")
+}
+
+fn skip_whitespace(chars: &mut Peekable<CharIndices>) {
+    while let Some((_, ' ' | '\n' | '\r' | '\t')) = chars.peek() {
+        chars.next();
+    }
+}
+
+fn next_chars<const N: usize>(chars: &mut Peekable<CharIndices>) -> [Option<char>; N] {
+    array::from_fn(|_| chars.next().map(|(_, c)| c))
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_parse() {
+        assert_eq!(parse("null").unwrap(), Json::Null);
+        assert_eq!(parse("true").unwrap(), Json::Bool(true));
+        assert_eq!(parse("false").unwrap(), Json::Bool(false));
+        assert_eq!(parse("42").unwrap(), Json::Integer(42));
+        assert_eq!(parse("42.0").unwrap(), Json::Number(42.0));
+        assert_eq!(parse(r#""hello""#).unwrap(), Json::String("hello"));
+        assert_eq!(
+            parse("[1,2.0,3]").unwrap(),
+            Json::Array(vec![Json::Integer(1), Json::Number(2.0), Json::Integer(3)])
+        );
+        let mut obj = HashMap::new();
+        obj.insert("key", Json::String("value"));
+        assert_eq!(parse(r#"{"key":"value"}"#).unwrap(), Json::Object(obj));
+    }
+
+    #[test]
+    fn test_whitespace_handling() {
+        assert_eq!(parse("  null  ").unwrap(), Json::Null);
+        assert_eq!(parse("  true  ").unwrap(), Json::Bool(true));
+        assert_eq!(
+            parse(" [ 1 , 2.0 , 3 ] ").unwrap(),
+            Json::Array(vec![Json::Integer(1), Json::Number(2.0), Json::Integer(3)])
+        );
+        let mut obj = HashMap::new();
+        obj.insert("key", Json::String("value"));
+        assert_eq!(parse(r#"  { "key" : "value" }  "#).unwrap(), Json::Object(obj));
+    }
+
+    #[test]
+    fn test_empty_collections() {
+        assert_eq!(parse("[]").unwrap(), Json::Array(vec![]));
+        assert_eq!(parse("{}").unwrap(), Json::Object(HashMap::new()));
+        assert_eq!(parse("[ ]").unwrap(), Json::Array(vec![]));
+        assert_eq!(parse("{ }").unwrap(), Json::Object(HashMap::new()));
+    }
+
+    #[test]
+    fn test_nested_structures() {
+        assert_eq!(
+            parse(r#"{"nested":{"inner":"value"}}"#).unwrap(),
+            Json::Object({
+                let mut outer = HashMap::new();
+                let mut inner = HashMap::new();
+                inner.insert("inner", Json::String("value"));
+                outer.insert("nested", Json::Object(inner));
+                outer
+            })
+        );
+        assert_eq!(
+            parse("[[1,2],[3,4]]").unwrap(),
+            Json::Array(vec![
+                Json::Array(vec![Json::Integer(1), Json::Integer(2)]),
+                Json::Array(vec![Json::Integer(3), Json::Integer(4)])
+            ])
+        );
+    }
+
+    #[test]
+    fn test_numbers() {
+        assert_eq!(parse("0").unwrap(), Json::Integer(0));
+        assert_eq!(parse("-42").unwrap(), Json::Integer(-42));
+        assert_eq!(parse("3.14").unwrap(), Json::Number(3.14));
+        assert_eq!(parse("-3.14").unwrap(), Json::Number(-3.14));
+        assert_eq!(parse("1e10").unwrap(), Json::Number(1e10));
+        assert_eq!(parse("1E10").unwrap(), Json::Number(1E10));
+        assert_eq!(parse("1e-10").unwrap(), Json::Number(1e-10));
+        assert_eq!(parse("1.5e+10").unwrap(), Json::Number(1.5e+10));
+    }
+
+    #[test]
+    fn test_strings() {
+        assert_eq!(parse(r#""""#).unwrap(), Json::String(""));
+        assert_eq!(parse(r#""hello world""#).unwrap(), Json::String("hello world"));
+        assert_eq!(
+            parse(r#""with spaces and 123""#).unwrap(),
+            Json::String("with spaces and 123")
+        );
+    }
+
+    #[test]
+    fn test_mixed_array() {
+        assert_eq!(
+            parse(r#"[null, true, false, 35.1, 42, "text", [], {}]"#).unwrap(),
+            Json::Array(vec![
+                Json::Null,
+                Json::Bool(true),
+                Json::Bool(false),
+                Json::Number(35.1),
+                Json::Integer(42),
+                Json::String("text"),
+                Json::Array(vec![]),
+                Json::Object(HashMap::new())
+            ])
+        );
+    }
+
+    #[test]
+    fn test_object_multiple_keys() {
+        let mut obj = HashMap::new();
+        obj.insert("a", Json::Integer(1));
+        obj.insert("b", Json::Bool(true));
+        obj.insert("c", Json::Null);
+        assert_eq!(parse(r#"{"a":1,"b":true,"c":null}"#).unwrap(), Json::Object(obj));
+    }
+
+    #[test]
+    fn test_error_cases() {
+        assert!(parse("").is_err());
+        assert!(parse("nul").is_err());
+        assert!(parse("tru").is_err());
+        assert!(parse("fals").is_err());
+        assert!(parse(r#""unterminated"#).is_err());
+        assert!(parse("[1,2,]").is_err());
+        assert!(parse(r#"{"key""#).is_err());
+        assert!(parse(r#"{"key":"value""#).is_err());
+        assert!(parse(r#"{"key":"value",}"#).is_err());
+        assert!(parse("invalid").is_err());
+        assert!(parse("[1 2]").is_err());
+        assert!(parse(r#"{"key":"value" "key2":"value2"}"#).is_err());
+    }
+}
@@ -1,14 +1,15 @@
-use std::ffi::CStr;
+use std::ffi::{CStr, CString};
 use std::os::raw::c_int;
 use std::ptr;

 use crate::chunk::ChunkMode;
-use crate::error::Result;
+use crate::error::{Error, Result};
 use crate::function::Function;
 use crate::state::{callback_error_ext, ExtraData, Lua};
 use crate::traits::{FromLuaMulti, IntoLua};
 use crate::types::MaybeSend;

+pub use heap_dump::HeapDump;
 pub use require::{NavigateError, Require, TextRequirer};

 // Since Luau has some missing standard functions, we re-implement them here
@@ -22,6 +23,56 @@ impl Lua {
        require::create_require_function(self, require)
    }

+    /// Set the memory category for subsequent allocations from this Lua state.
+    ///
+    /// The category "main" is reserved for the default memory category.
+    /// Maximum of 255 categories can be registered.
+    /// The category is set per Lua thread (state) and affects all allocations made from that
+    /// thread.
+    ///
+    /// Return error if too many categories are registered or if the category name is invalid.
+    ///
+    /// See [`Lua::heap_dump`] for tracking memory usage by category.
+    #[cfg(any(feature = "luau", doc))]
+    #[cfg_attr(docsrs, doc(cfg(feature = "luau")))]
+    pub fn set_memory_category(&self, category: &str) -> Result<()> {
+        let lua = self.lock();
+
+        if category.contains(|c| !matches!(c, 'a'..='z' | 'A'..='Z' | '0'..='9' | '-' | '_')) {
+            return Err(Error::runtime("invalid memory category name"));
+        }
+        let cat_id = unsafe {
+            let extra = ExtraData::get(lua.state());
+            match ((*extra).mem_categories.iter().enumerate())
+                .find(|&(_, name)| name.as_bytes() == category.as_bytes())
+            {
+                Some((id, _)) => id as u8,
+                None => {
+                    let new_id = (*extra).mem_categories.len() as u8;
+                    if new_id == 255 {
+                        return Err(Error::runtime("too many memory categories registered"));
+                    }
+                    (*extra).mem_categories.push(CString::new(category).unwrap());
+                    new_id
+                }
+            }
+        };
+        unsafe { ffi::lua_setmemcat(lua.state(), cat_id as i32) };
+
+        Ok(())
+    }
+
+    /// Dumps the current Lua VM heap state.
+    ///
+    /// The returned `HeapDump` can be used to analyze memory usage.
+    /// It's recommended to call [`Lua::gc_collect`] before dumping the heap.
+    #[cfg(any(feature = "luau", doc))]
+    #[cfg_attr(docsrs, doc(cfg(feature = "luau")))]
+    pub fn heap_dump(&self) -> Result<HeapDump> {
+        let lua = self.lock();
+        unsafe { heap_dump::HeapDump::new(lua.state()).ok_or_else(|| Error::runtime("unable to dump heap")) }
+    }
+
    pub(crate) unsafe fn configure_luau(&self) -> Result<()> {
        let globals = self.globals();

@@ -96,4 +147,6 @@ unsafe extern "C-unwind" fn lua_loadstring(state: *mut ffi::lua_State) -> c_int
    })
 }

+mod heap_dump;
+mod json;
 mod require;
@@ -1,12 +1,10 @@
 use std::cell::RefCell;
-use std::collections::VecDeque;
 use std::ffi::CStr;
 use std::io::Result as IoResult;
 use std::ops::{Deref, DerefMut};
 use std::os::raw::{c_char, c_int, c_void};
-use std::path::{Component, Path, PathBuf};
 use std::result::Result as StdResult;
-use std::{env, fmt, fs, mem, ptr};
+use std::{fmt, mem, ptr};

 use crate::error::{Error, Result};
 use crate::function::Function;
@@ -14,9 +12,10 @@ use crate::state::{callback_error_ext, Lua};
 use crate::table::Table;
 use crate::types::MaybeSend;

+// TODO: Rename to FsRequirer
+pub use fs::TextRequirer;
+
 /// An error that can occur during navigation in the Luau `require-by-string` system.
-#[cfg(any(feature = "luau", doc))]
-#[cfg_attr(docsrs, doc(cfg(feature = "luau")))]
 #[derive(Debug, Clone)]
 pub enum NavigateError {
    Ambiguous,
@@ -50,9 +49,10 @@ impl From<Error> for NavigateError {
 #[cfg(feature = "luau")]
 type WriteResult = ffi::luarequire_WriteResult;

+#[cfg(feature = "luau")]
+type ConfigStatus = ffi::luarequire_ConfigStatus;
+
 /// A trait for handling modules loading and navigation in the Luau `require-by-string` system.
-#[cfg(any(feature = "luau", doc))]
-#[cfg_attr(docsrs, doc(cfg(feature = "luau")))]
 pub trait Require {
    /// Returns `true` if "require" is permitted for the given chunk name.
    fn is_require_allowed(&self, chunk_name: &str) -> bool;
@@ -73,7 +73,7 @@ pub trait Require {
    /// Navigate to the given child directory.
    fn to_child(&mut self, name: &str) -> StdResult<(), NavigateError>;

-    /// Returns whether the context is currently pointing at a module
+    /// Returns whether the context is currently pointing at a module.
    fn has_module(&self) -> bool;

    /// Provides a cache key representing the current module.
@@ -103,226 +103,31 @@ impl fmt::Debug for dyn Require {
    }
 }

-/// The standard implementation of Luau `require-by-string` navigation.
-#[derive(Default, Debug)]
-pub struct TextRequirer {
-    /// An absolute path to the current Luau module (not mapped to a physical file)
-    abs_path: PathBuf,
-    /// A relative path to the current Luau module (not mapped to a physical file)
-    rel_path: PathBuf,
-    /// A physical path to the current Luau module, which is a file or a directory with an
-    /// `init.lua(u)` file
-    resolved_path: Option<PathBuf>,
+struct Context {
+    require: Box<dyn Require>,
+    config_cache: Option<IoResult<Vec<u8>>>,
 }

-impl TextRequirer {
-    /// The prefix used for chunk names in the require system.
-    /// Only chunk names starting with this prefix are allowed to be used in `require`.
-    const CHUNK_PREFIX: &str = "@";
-
-    /// The file extensions that are considered valid for Luau modules.
-    const FILE_EXTENSIONS: &[&str] = &["luau", "lua"];
-
-    /// Creates a new `TextRequirer` instance.
-    pub fn new() -> Self {
-        Self::default()
-    }
-
-    fn normalize_chunk_name(chunk_name: &str) -> &str {
-        if let Some((path, line)) = chunk_name.rsplit_once(':') {
-            if line.parse::<u32>().is_ok() {
-                return path;
-            }
-        }
-        chunk_name
-    }
-
-    // Normalizes the path by removing unnecessary components
-    fn normalize_path(path: &Path) -> PathBuf {
-        let mut components = VecDeque::new();
-
-        for comp in path.components() {
-            match comp {
-                Component::Prefix(..) | Component::RootDir => {
-                    components.push_back(comp);
-                }
-                Component::CurDir => {}
-                Component::ParentDir => {
-                    if matches!(components.back(), None | Some(Component::ParentDir)) {
-                        components.push_back(Component::ParentDir);
-                    } else if matches!(components.back(), Some(Component::Normal(..))) {
-                        components.pop_back();
-                    }
-                }
-                Component::Normal(..) => components.push_back(comp),
-            }
-        }
-
-        if matches!(components.front(), None | Some(Component::Normal(..))) {
-            components.push_front(Component::CurDir);
-        }
-
-        // Join the components back together
-        components.into_iter().collect()
-    }
-
-    /// Resolve a Luau module path to a physical file or directory.
-    ///
-    /// Empty directories without init files are considered valid as "intermediate" directories.
-    fn resolve_module(path: &Path) -> StdResult<Option<PathBuf>, NavigateError> {
-        let mut found_path = None;
-
-        if path.components().next_back() != Some(Component::Normal("init".as_ref())) {
-            let current_ext = (path.extension().and_then(|s| s.to_str()))
-                .map(|s| format!("{s}."))
-                .unwrap_or_default();
-            for ext in Self::FILE_EXTENSIONS {
-                let candidate = path.with_extension(format!("{current_ext}{ext}"));
-                if candidate.is_file() && found_path.replace(candidate).is_some() {
-                    return Err(NavigateError::Ambiguous);
-                }
-            }
-        }
-        if path.is_dir() {
-            for component in Self::FILE_EXTENSIONS.iter().map(|ext| format!("init.{ext}")) {
-                let candidate = path.join(component);
-                if candidate.is_file() && found_path.replace(candidate).is_some() {
-                    return Err(NavigateError::Ambiguous);
-                }
-            }
-
-            if found_path.is_none() {
-                // Directories without init files are considered valid "intermediate" path
-                return Ok(None);
-            }
-        }
-
-        Ok(Some(found_path.ok_or(NavigateError::NotFound)?))
-    }
-}
-
-impl Require for TextRequirer {
-    fn is_require_allowed(&self, chunk_name: &str) -> bool {
-        chunk_name.starts_with(Self::CHUNK_PREFIX)
-    }
-
-    fn reset(&mut self, chunk_name: &str) -> StdResult<(), NavigateError> {
-        if !chunk_name.starts_with(Self::CHUNK_PREFIX) {
-            return Err(NavigateError::NotFound);
-        }
-        let chunk_name = Self::normalize_chunk_name(&chunk_name[1..]);
-        let chunk_path = Self::normalize_path(chunk_name.as_ref());
-
-        if chunk_path.extension() == Some("rs".as_ref()) {
-            // Special case for Rust source files, reset to the current directory
-            let chunk_filename = chunk_path.file_name().unwrap();
-            let cwd = env::current_dir().map_err(|_| NavigateError::NotFound)?;
-            self.abs_path = Self::normalize_path(&cwd.join(chunk_filename));
-            self.rel_path = ([Component::CurDir, Component::Normal(chunk_filename)].into_iter()).collect();
-            self.resolved_path = None;
-
-            return Ok(());
-        }
-
-        if chunk_path.is_absolute() {
-            let resolved_path = Self::resolve_module(&chunk_path)?;
-            self.abs_path = chunk_path.clone();
-            self.rel_path = chunk_path;
-            self.resolved_path = resolved_path;
-        } else {
-            // Relative path
-            let cwd = env::current_dir().map_err(|_| NavigateError::NotFound)?;
-            let abs_path = Self::normalize_path(&cwd.join(&chunk_path));
-            let resolved_path = Self::resolve_module(&abs_path)?;
-            self.abs_path = abs_path;
-            self.rel_path = chunk_path;
-            self.resolved_path = resolved_path;
-        }
-
-        Ok(())
-    }
-
-    fn jump_to_alias(&mut self, path: &str) -> StdResult<(), NavigateError> {
-        let path = Self::normalize_path(path.as_ref());
-        let resolved_path = Self::resolve_module(&path)?;
-
-        self.abs_path = path.clone();
-        self.rel_path = path;
-        self.resolved_path = resolved_path;
-
-        Ok(())
-    }
-
-    fn to_parent(&mut self) -> StdResult<(), NavigateError> {
-        let mut abs_path = self.abs_path.clone();
-        if !abs_path.pop() {
-            // It's important to return `NotFound` if we reached the root, as it's a "recoverable" error if we
-            // cannot go beyond the root directory.
-            // Luau "require-by-string` has a special logic to search for config file to resolve aliases.
-            return Err(NavigateError::NotFound);
-        }
-        let mut rel_parent = self.rel_path.clone();
-        rel_parent.pop();
-        let resolved_path = Self::resolve_module(&abs_path)?;
-
-        self.abs_path = abs_path;
-        self.rel_path = Self::normalize_path(&rel_parent);
-        self.resolved_path = resolved_path;
-
-        Ok(())
-    }
-
-    fn to_child(&mut self, name: &str) -> StdResult<(), NavigateError> {
-        let abs_path = self.abs_path.join(name);
-        let rel_path = self.rel_path.join(name);
-        let resolved_path = Self::resolve_module(&abs_path)?;
-
-        self.abs_path = abs_path;
-        self.rel_path = rel_path;
-        self.resolved_path = resolved_path;
-
-        Ok(())
-    }
-
-    fn has_module(&self) -> bool {
-        (self.resolved_path.as_deref())
-            .map(Path::is_file)
-            .unwrap_or(false)
-    }
-
-    fn cache_key(&self) -> String {
-        self.resolved_path.as_deref().unwrap().display().to_string()
-    }
-
-    fn has_config(&self) -> bool {
-        self.abs_path.is_dir() && self.abs_path.join(".luaurc").is_file()
-    }
-
-    fn config(&self) -> IoResult<Vec<u8>> {
-        fs::read(self.abs_path.join(".luaurc"))
-    }
-
-    fn loader(&self, lua: &Lua) -> Result<Function> {
-        let name = format!("@{}", self.rel_path.display());
-        lua.load(self.resolved_path.as_deref().unwrap())
-            .set_name(name)
-            .into_function()
-    }
-}
-
-struct Context(Box<dyn Require>);
-
 impl Deref for Context {
    type Target = dyn Require;

    fn deref(&self) -> &Self::Target {
-        &*self.0
+        &*self.require
    }
 }

 impl DerefMut for Context {
    fn deref_mut(&mut self) -> &mut Self::Target {
-        &mut *self.0
+        &mut *self.require
+    }
+}
+
+impl Context {
+    fn new(require: impl Require + MaybeSend + 'static) -> Self {
+        Context {
+            require: Box::new(require),
+            config_cache: None,
+        }
    }
 }

@@ -447,9 +252,18 @@ pub(super) unsafe extern "C-unwind" fn init_config(config: *mut ffi::luarequire_
        write_to_buffer(buffer, buffer_size, size_out, cache_key.as_bytes())
    }

-    unsafe extern "C-unwind" fn is_config_present(state: *mut ffi::lua_State, ctx: *mut c_void) -> bool {
-        let this = try_borrow!(state, ctx);
-        this.has_config()
+    unsafe extern "C-unwind" fn get_config_status(
+        state: *mut ffi::lua_State,
+        ctx: *mut c_void,
+    ) -> ConfigStatus {
+        let mut this = try_borrow_mut!(state, ctx);
+        if this.has_config() {
+            this.config_cache = Some(this.config());
+            if let Some(Ok(data)) = &this.config_cache {
+                return detect_config_format(data);
+            }
+        }
+        ConfigStatus::Absent
    }

    unsafe extern "C-unwind" fn get_config(
@@ -459,8 +273,10 @@ pub(super) unsafe extern "C-unwind" fn init_config(config: *mut ffi::luarequire_
        buffer_size: usize,
        size_out: *mut usize,
    ) -> WriteResult {
-        let this = try_borrow!(state, ctx);
-        let config = callback_error_ext(state, ptr::null_mut(), true, move |_, _| Ok(this.config()?));
+        let mut this = try_borrow_mut!(state, ctx);
+        let config = callback_error_ext(state, ptr::null_mut(), true, move |_, _| {
+            Ok(this.config_cache.take().unwrap_or_else(|| this.config())?)
+        });
        write_to_buffer(buffer, buffer_size, size_out, &config)
    }

@@ -483,18 +299,32 @@ pub(super) unsafe extern "C-unwind" fn init_config(config: *mut ffi::luarequire_
    (*config).is_require_allowed = is_require_allowed;
    (*config).reset = reset;
    (*config).jump_to_alias = jump_to_alias;
+    (*config).to_alias_fallback = None;
    (*config).to_parent = to_parent;
    (*config).to_child = to_child;
    (*config).is_module_present = is_module_present;
    (*config).get_chunkname = get_chunkname;
    (*config).get_loadname = get_loadname;
    (*config).get_cache_key = get_cache_key;
-    (*config).is_config_present = is_config_present;
+    (*config).get_config_status = get_config_status;
    (*config).get_alias = None;
    (*config).get_config = Some(get_config);
    (*config).load = load;
 }

+/// Detect configuration file format (JSON or Luau)
+#[cfg(feature = "luau")]
+fn detect_config_format(data: &[u8]) -> ConfigStatus {
+    let data = data.trim_ascii();
+    if data.starts_with(b"{") {
+        let data = &data[1..].trim_ascii_start();
+        if data.starts_with(b"\"") || data == b"}" {
+            return ConfigStatus::PresentJson;
+        }
+    }
+    ConfigStatus::PresentLuau
+}
+
 /// Helper function to write data to a buffer
 #[cfg(feature = "luau")]
 unsafe fn write_to_buffer(
@@ -545,7 +375,7 @@ pub(super) fn create_require_function<R: Require + MaybeSend + 'static>(

    let (get_cache_key, find_current_file, proxyrequire, registered_modules, loader_cache) = unsafe {
        lua.exec_raw::<(Function, Function, Function, Table, Table)>((), move |state| {
-            let context = Context(Box::new(require));
+            let context = Context::new(require);
            let context_ptr = ffi::lua_newuserdata_t(state, RefCell::new(context));
            ffi::lua_pushcclosured(state, get_cache_key, cstr!("get_cache_key"), 1);
            ffi::lua_pushcfunctiond(state, find_current_file, cstr!("find_current_file"));
@@ -637,52 +467,4 @@ pub(super) fn create_require_function<R: Require + MaybeSend + 'static>(
    .into_function()
 }

-#[cfg(test)]
-mod tests {
-    use std::path::Path;
-
-    use super::TextRequirer;
-
-    #[test]
-    fn test_path_normalize() {
-        for (input, expected) in [
-            // Basic formatting checks
-            ("", "./"),
-            (".", "./"),
-            ("a/relative/path", "./a/relative/path"),
-            // Paths containing extraneous '.' and '/' symbols
-            ("./remove/extraneous/symbols/", "./remove/extraneous/symbols"),
-            ("./remove/extraneous//symbols", "./remove/extraneous/symbols"),
-            ("./remove/extraneous/symbols/.", "./remove/extraneous/symbols"),
-            ("./remove/extraneous/./symbols", "./remove/extraneous/symbols"),
-            ("../remove/extraneous/symbols/", "../remove/extraneous/symbols"),
-            ("../remove/extraneous//symbols", "../remove/extraneous/symbols"),
-            ("../remove/extraneous/symbols/.", "../remove/extraneous/symbols"),
-            ("../remove/extraneous/./symbols", "../remove/extraneous/symbols"),
-            ("/remove/extraneous/symbols/", "/remove/extraneous/symbols"),
-            ("/remove/extraneous//symbols", "/remove/extraneous/symbols"),
-            ("/remove/extraneous/symbols/.", "/remove/extraneous/symbols"),
-            ("/remove/extraneous/./symbols", "/remove/extraneous/symbols"),
-            // Paths containing '..'
-            ("./remove/me/..", "./remove"),
-            ("./remove/me/../", "./remove"),
-            ("../remove/me/..", "../remove"),
-            ("../remove/me/../", "../remove"),
-            ("/remove/me/..", "/remove"),
-            ("/remove/me/../", "/remove"),
-            ("./..", "../"),
-            ("./../", "../"),
-            ("../..", "../../"),
-            ("../../", "../../"),
-            // '..' disappears if path is absolute and component is non-erasable
-            ("/../", "/"),
-        ] {
-            let path = TextRequirer::normalize_path(input.as_ref());
-            assert_eq!(
-                &path,
-                expected.as_ref() as &Path,
-                "wrong normalization for {input}"
-            );
-        }
-    }
-}
+mod fs;
@@ -0,0 +1,278 @@
+use std::collections::VecDeque;
+use std::io::Result as IoResult;
+use std::path::{Component, Path, PathBuf};
+use std::result::Result as StdResult;
+use std::{env, fs};
+
+use crate::error::Result;
+use crate::function::Function;
+use crate::state::Lua;
+
+use super::{NavigateError, Require};
+
+/// The standard implementation of Luau `require-by-string` navigation.
+#[derive(Default, Debug)]
+pub struct TextRequirer {
+    /// An absolute path to the current Luau module (not mapped to a physical file)
+    abs_path: PathBuf,
+    /// A relative path to the current Luau module (not mapped to a physical file)
+    rel_path: PathBuf,
+    /// A physical path to the current Luau module, which is a file or a directory with an
+    /// `init.lua(u)` file
+    resolved_path: Option<PathBuf>,
+}
+
+impl TextRequirer {
+    /// The prefix used for chunk names in the require system.
+    /// Only chunk names starting with this prefix are allowed to be used in `require`.
+    const CHUNK_PREFIX: &str = "@";
+
+    /// The file extensions that are considered valid for Luau modules.
+    const FILE_EXTENSIONS: &[&str] = &["luau", "lua"];
+
+    /// The filename for the JSON configuration file.
+    const LUAURC_CONFIG_FILENAME: &str = ".luaurc";
+
+    /// The filename for the Luau configuration file.
+    const LUAU_CONFIG_FILENAME: &str = ".config.luau";
+
+    /// Creates a new `TextRequirer` instance.
+    pub fn new() -> Self {
+        Self::default()
+    }
+
+    fn normalize_chunk_name(chunk_name: &str) -> &str {
+        if let Some((path, line)) = chunk_name.rsplit_once(':') {
+            if line.parse::<u32>().is_ok() {
+                return path;
+            }
+        }
+        chunk_name
+    }
+
+    // Normalizes the path by removing unnecessary components
+    fn normalize_path(path: &Path) -> PathBuf {
+        let mut components = VecDeque::new();
+
+        for comp in path.components() {
+            match comp {
+                Component::Prefix(..) | Component::RootDir => {
+                    components.push_back(comp);
+                }
+                Component::CurDir => {}
+                Component::ParentDir => {
+                    if matches!(components.back(), None | Some(Component::ParentDir)) {
+                        components.push_back(Component::ParentDir);
+                    } else if matches!(components.back(), Some(Component::Normal(..))) {
+                        components.pop_back();
+                    }
+                }
+                Component::Normal(..) => components.push_back(comp),
+            }
+        }
+
+        if matches!(components.front(), None | Some(Component::Normal(..))) {
+            components.push_front(Component::CurDir);
+        }
+
+        // Join the components back together
+        components.into_iter().collect()
+    }
+
+    /// Resolve a Luau module path to a physical file or directory.
+    ///
+    /// Empty directories without init files are considered valid as "intermediate" directories.
+    fn resolve_module(path: &Path) -> StdResult<Option<PathBuf>, NavigateError> {
+        let mut found_path = None;
+
+        if path.components().next_back() != Some(Component::Normal("init".as_ref())) {
+            let current_ext = (path.extension().and_then(|s| s.to_str()))
+                .map(|s| format!("{s}."))
+                .unwrap_or_default();
+            for ext in Self::FILE_EXTENSIONS {
+                let candidate = path.with_extension(format!("{current_ext}{ext}"));
+                if candidate.is_file() && found_path.replace(candidate).is_some() {
+                    return Err(NavigateError::Ambiguous);
+                }
+            }
+        }
+        if path.is_dir() {
+            for component in Self::FILE_EXTENSIONS.iter().map(|ext| format!("init.{ext}")) {
+                let candidate = path.join(component);
+                if candidate.is_file() && found_path.replace(candidate).is_some() {
+                    return Err(NavigateError::Ambiguous);
+                }
+            }
+
+            if found_path.is_none() {
+                // Directories without init files are considered valid "intermediate" path
+                return Ok(None);
+            }
+        }
+
+        Ok(Some(found_path.ok_or(NavigateError::NotFound)?))
+    }
+}
+
+impl Require for TextRequirer {
+    fn is_require_allowed(&self, chunk_name: &str) -> bool {
+        chunk_name.starts_with(Self::CHUNK_PREFIX)
+    }
+
+    fn reset(&mut self, chunk_name: &str) -> StdResult<(), NavigateError> {
+        if !chunk_name.starts_with(Self::CHUNK_PREFIX) {
+            return Err(NavigateError::NotFound);
+        }
+        let chunk_name = Self::normalize_chunk_name(&chunk_name[1..]);
+        let chunk_path = Self::normalize_path(chunk_name.as_ref());
+
+        if chunk_path.extension() == Some("rs".as_ref()) {
+            // Special case for Rust source files, reset to the current directory
+            let chunk_filename = chunk_path.file_name().unwrap();
+            let cwd = env::current_dir().map_err(|_| NavigateError::NotFound)?;
+            self.abs_path = Self::normalize_path(&cwd.join(chunk_filename));
+            self.rel_path = ([Component::CurDir, Component::Normal(chunk_filename)].into_iter()).collect();
+            self.resolved_path = None;
+
+            return Ok(());
+        }
+
+        if chunk_path.is_absolute() {
+            let resolved_path = Self::resolve_module(&chunk_path)?;
+            self.abs_path = chunk_path.clone();
+            self.rel_path = chunk_path;
+            self.resolved_path = resolved_path;
+        } else {
+            // Relative path
+            let cwd = env::current_dir().map_err(|_| NavigateError::NotFound)?;
+            let abs_path = Self::normalize_path(&cwd.join(&chunk_path));
+            let resolved_path = Self::resolve_module(&abs_path)?;
+            self.abs_path = abs_path;
+            self.rel_path = chunk_path;
+            self.resolved_path = resolved_path;
+        }
+
+        Ok(())
+    }
+
+    fn jump_to_alias(&mut self, path: &str) -> StdResult<(), NavigateError> {
+        let path = Self::normalize_path(path.as_ref());
+        let resolved_path = Self::resolve_module(&path)?;
+
+        self.abs_path = path.clone();
+        self.rel_path = path;
+        self.resolved_path = resolved_path;
+
+        Ok(())
+    }
+
+    fn to_parent(&mut self) -> StdResult<(), NavigateError> {
+        let mut abs_path = self.abs_path.clone();
+        if !abs_path.pop() {
+            // It's important to return `NotFound` if we reached the root, as it's a "recoverable" error if we
+            // cannot go beyond the root directory.
+            // Luau "require-by-string` has a special logic to search for config file to resolve aliases.
+            return Err(NavigateError::NotFound);
+        }
+        let mut rel_parent = self.rel_path.clone();
+        rel_parent.pop();
+        let resolved_path = Self::resolve_module(&abs_path)?;
+
+        self.abs_path = abs_path;
+        self.rel_path = Self::normalize_path(&rel_parent);
+        self.resolved_path = resolved_path;
+
+        Ok(())
+    }
+
+    fn to_child(&mut self, name: &str) -> StdResult<(), NavigateError> {
+        let abs_path = self.abs_path.join(name);
+        let rel_path = self.rel_path.join(name);
+        let resolved_path = Self::resolve_module(&abs_path)?;
+
+        self.abs_path = abs_path;
+        self.rel_path = rel_path;
+        self.resolved_path = resolved_path;
+
+        Ok(())
+    }
+
+    fn has_module(&self) -> bool {
+        (self.resolved_path.as_deref())
+            .map(Path::is_file)
+            .unwrap_or(false)
+    }
+
+    fn cache_key(&self) -> String {
+        self.resolved_path.as_deref().unwrap().display().to_string()
+    }
+
+    fn has_config(&self) -> bool {
+        self.abs_path.is_dir() && self.abs_path.join(Self::LUAURC_CONFIG_FILENAME).is_file()
+            || self.abs_path.is_dir() && self.abs_path.join(Self::LUAU_CONFIG_FILENAME).is_file()
+    }
+
+    fn config(&self) -> IoResult<Vec<u8>> {
+        if self.abs_path.join(Self::LUAURC_CONFIG_FILENAME).is_file() {
+            return fs::read(self.abs_path.join(Self::LUAURC_CONFIG_FILENAME));
+        }
+        fs::read(self.abs_path.join(Self::LUAU_CONFIG_FILENAME))
+    }
+
+    fn loader(&self, lua: &Lua) -> Result<Function> {
+        let name = format!("@{}", self.rel_path.display());
+        lua.load(self.resolved_path.as_deref().unwrap())
+            .set_name(name)
+            .into_function()
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use std::path::Path;
+
+    use super::TextRequirer;
+
+    #[test]
+    fn test_path_normalize() {
+        for (input, expected) in [
+            // Basic formatting checks
+            ("", "./"),
+            (".", "./"),
+            ("a/relative/path", "./a/relative/path"),
+            // Paths containing extraneous '.' and '/' symbols
+            ("./remove/extraneous/symbols/", "./remove/extraneous/symbols"),
+            ("./remove/extraneous//symbols", "./remove/extraneous/symbols"),
+            ("./remove/extraneous/symbols/.", "./remove/extraneous/symbols"),
+            ("./remove/extraneous/./symbols", "./remove/extraneous/symbols"),
+            ("../remove/extraneous/symbols/", "../remove/extraneous/symbols"),
+            ("../remove/extraneous//symbols", "../remove/extraneous/symbols"),
+            ("../remove/extraneous/symbols/.", "../remove/extraneous/symbols"),
+            ("../remove/extraneous/./symbols", "../remove/extraneous/symbols"),
+            ("/remove/extraneous/symbols/", "/remove/extraneous/symbols"),
+            ("/remove/extraneous//symbols", "/remove/extraneous/symbols"),
+            ("/remove/extraneous/symbols/.", "/remove/extraneous/symbols"),
+            ("/remove/extraneous/./symbols", "/remove/extraneous/symbols"),
+            // Paths containing '..'
+            ("./remove/me/..", "./remove"),
+            ("./remove/me/../", "./remove"),
+            ("../remove/me/..", "../remove"),
+            ("../remove/me/../", "../remove"),
+            ("/remove/me/..", "/remove"),
+            ("/remove/me/../", "/remove"),
+            ("./..", "../"),
+            ("./../", "../"),
+            ("../..", "../../"),
+            ("../../", "../../"),
+            // '..' disappears if path is absolute and component is non-erasable
+            ("/../", "/"),
+        ] {
+            let path = TextRequirer::normalize_path(input.as_ref());
+            assert_eq!(
+                &path,
+                expected.as_ref() as &Path,
+                "wrong normalization for {input}"
+            );
+        }
+    }
+}
@@ -204,6 +204,23 @@ impl IntoLuaMulti for MultiValue {
    }
 }

+impl IntoLuaMulti for &MultiValue {
+    #[inline]
+    fn into_lua_multi(self, _: &Lua) -> Result<MultiValue> {
+        Ok(self.clone())
+    }
+
+    #[inline]
+    unsafe fn push_into_stack_multi(self, lua: &RawLua) -> Result<c_int> {
+        let nresults = self.len() as i32;
+        check_stack(lua.state(), nresults + 1)?;
+        for value in &self.0 {
+            lua.push_value(value)?;
+        }
+        Ok(nresults)
+    }
+}
+
 impl FromLuaMulti for MultiValue {
    #[inline]
    fn from_lua_multi(values: MultiValue, _: &Lua) -> Result<Self> {
@@ -875,7 +875,7 @@ impl Lua {
        }
    }

-    /// Gets information about the interpreter runtime stack at a given level.
+    /// Gets information about the interpreter runtime stack at the given level.
    ///
    /// This function calls callback `f`, passing the [`Debug`] structure that can be used to get
    /// information about the function executing at a given level.
@@ -899,6 +899,26 @@ impl Lua {
        }
    }

+    /// Creates a traceback of the call stack at the given level.
+    ///
+    /// The `msg` parameter, if provided, is added at the beginning of the traceback.
+    /// The `level` parameter works the same way as in [`Lua::inspect_stack`].
+    pub fn traceback(&self, msg: Option<&str>, level: usize) -> Result<String> {
+        let lua = self.lock();
+        unsafe {
+            check_stack(lua.state(), 3)?;
+            protect_lua!(lua.state(), 0, 1, |state| {
+                let msg = match msg {
+                    Some(s) => ffi::lua_pushlstring(state, s.as_ptr() as *const c_char, s.len()),
+                    None => ptr::null(),
+                };
+                // `protect_lua` adds it's own call frame, so we need to increase level by 1
+                ffi::luaL_traceback(state, state, msg, (level + 1) as c_int);
+            })?;
+            Ok(String(lua.pop_ref()))
+        }
+    }
+
    /// Returns the amount of memory (in bytes) currently used inside this Lua state.
    pub fn used_memory(&self) -> usize {
        let lua = self.lock();
@@ -1160,7 +1180,7 @@ impl Lua {
    /// and `&String`, you can also pass plain `&[u8]` here.
    #[inline]
    pub fn create_string(&self, s: impl AsRef<[u8]>) -> Result<String> {
-        unsafe { self.lock().create_string(s) }
+        unsafe { self.lock().create_string(s.as_ref()) }
    }

    /// Creates and returns a Luau [buffer] object from a byte slice of data.
@@ -1494,7 +1514,27 @@ impl Lua {
        unsafe { self.lock().make_userdata(UserDataStorage::new(ud)) }
    }

-    /// Sets the metatable for a Lua builtin type.
+    /// Gets the metatable of a Lua built-in (primitive) type.
+    ///
+    /// The metatable is shared by all values of the given type.
+    ///
+    /// See [`Lua::set_type_metatable`] for examples.
+    #[allow(private_bounds)]
+    pub fn type_metatable<T: LuaType>(&self) -> Option<Table> {
+        let lua = self.lock();
+        let state = lua.state();
+        unsafe {
+            let _sg = StackGuard::new(state);
+            assert_stack(state, 2);
+
+            if lua.push_primitive_type::<T>() && ffi::lua_getmetatable(state, -1) != 0 {
+                return Some(Table(lua.pop_ref()));
+            }
+        }
+        None
+    }
+
+    /// Sets the metatable for a Lua built-in (primitive) type.
    ///
    /// The metatable will be shared by all values of the given type.
    ///
@@ -1521,44 +1561,13 @@ impl Lua {
            let _sg = StackGuard::new(state);
            assert_stack(state, 2);

-            match T::TYPE_ID {
-                ffi::LUA_TBOOLEAN => {
-                    ffi::lua_pushboolean(state, 0);
+            if lua.push_primitive_type::<T>() {
+                match metatable {
+                    Some(metatable) => lua.push_ref(&metatable.0),
+                    None => ffi::lua_pushnil(state),
                }
-                ffi::LUA_TLIGHTUSERDATA => {
-                    ffi::lua_pushlightuserdata(state, ptr::null_mut());
-                }
-                ffi::LUA_TNUMBER => {
-                    ffi::lua_pushnumber(state, 0.);
-                }
-                #[cfg(feature = "luau")]
-                ffi::LUA_TVECTOR => {
-                    #[cfg(not(feature = "luau-vector4"))]
-                    ffi::lua_pushvector(state, 0., 0., 0.);
-                    #[cfg(feature = "luau-vector4")]
-                    ffi::lua_pushvector(state, 0., 0., 0., 0.);
-                }
-                ffi::LUA_TSTRING => {
-                    ffi::lua_pushstring(state, b"\0" as *const u8 as *const _);
-                }
-                ffi::LUA_TFUNCTION => match self.load("function() end").eval::<Function>() {
-                    Ok(func) => lua.push_ref(&func.0),
-                    Err(_) => return,
-                },
-                ffi::LUA_TTHREAD => {
-                    ffi::lua_pushthread(state);
-                }
-                #[cfg(feature = "luau")]
-                ffi::LUA_TBUFFER => {
-                    ffi::lua_newbuffer(state, 0);
-                }
-                _ => return,
+                ffi::lua_setmetatable(state, -2);
            }
-            match metatable {
-                Some(metatable) => lua.push_ref(&metatable.0),
-                None => ffi::lua_pushnil(state),
-            }
-            ffi::lua_setmetatable(state, -2);
        }
    }

@@ -2167,9 +2176,13 @@ impl Lua {
            None => unsafe {
                let lua = self.lock();
                let state = lua.state();
-                let _sg = StackGuard::with_top(state, 0);
-                let nvals = ffi::lua_gettop(state);
-                Poll::Ready(R::from_stack_multi(nvals, &lua))
+                let top = ffi::lua_gettop(state);
+                if top == 0 || ffi::lua_type(state, 1) != ffi::LUA_TUSERDATA {
+                    // This must be impossible scenario if used correctly
+                    return Poll::Ready(R::from_stack_multi(0, &lua));
+                }
+                let _sg = StackGuard::with_top(state, 1);
+                Poll::Ready(R::from_stack_multi(top - 1, &lua))
            },
        })
        .await
@@ -94,6 +94,8 @@ pub(crate) struct ExtraData {
    pub(super) compiler: Option<Compiler>,
    #[cfg(feature = "luau-jit")]
    pub(super) enable_jit: bool,
+    #[cfg(feature = "luau")]
+    pub(crate) mem_categories: Vec<std::ffi::CString>,
 }

 impl Drop for ExtraData {
@@ -196,6 +198,8 @@ impl ExtraData {
            enable_jit: true,
            #[cfg(feature = "luau")]
            running_gc: false,
+            #[cfg(feature = "luau")]
+            mem_categories: vec![std::ffi::CString::new("main").unwrap()],
        }));

        // Store it in the registry
@@ -19,7 +19,7 @@ use crate::thread::Thread;
 use crate::traits::IntoLua;
 use crate::types::{
    AppDataRef, AppDataRefMut, Callback, CallbackUpvalue, DestructedUserdata, Integer, LightUserData,
-    MaybeSend, ReentrantMutex, RegistryKey, ValueRef, XRc,
+    LuaType, MaybeSend, ReentrantMutex, RegistryKey, ValueRef, XRc,
 };
 use crate::userdata::{
    init_userdata_metatable, AnyUserData, MetaMethod, RawUserDataRegistry, UserData, UserDataRegistry,
@@ -510,16 +510,16 @@ impl RawLua {
    }

    /// See [`Lua::create_string`]
-    pub(crate) unsafe fn create_string(&self, s: impl AsRef<[u8]>) -> Result<String> {
+    pub(crate) unsafe fn create_string(&self, s: &[u8]) -> Result<String> {
        let state = self.state();
        if self.unlikely_memory_error() {
-            push_string(state, s.as_ref(), false)?;
+            push_string(state, s, false)?;
            return Ok(String(self.pop_ref()));
        }

        let _sg = StackGuard::new(state);
        check_stack(state, 3)?;
-        push_string(state, s.as_ref(), true)?;
+        push_string(state, s, true)?;
        Ok(String(self.pop_ref()))
    }

@@ -665,6 +665,46 @@ impl RawLua {
        }
    }

+    /// Pushes a primitive type value onto the Lua stack.
+    pub(crate) unsafe fn push_primitive_type<T: LuaType>(&self) -> bool {
+        match T::TYPE_ID {
+            ffi::LUA_TBOOLEAN => {
+                ffi::lua_pushboolean(self.state(), 0);
+            }
+            ffi::LUA_TLIGHTUSERDATA => {
+                ffi::lua_pushlightuserdata(self.state(), ptr::null_mut());
+            }
+            ffi::LUA_TNUMBER => {
+                ffi::lua_pushnumber(self.state(), 0.);
+            }
+            #[cfg(feature = "luau")]
+            ffi::LUA_TVECTOR => {
+                #[cfg(not(feature = "luau-vector4"))]
+                ffi::lua_pushvector(self.state(), 0., 0., 0.);
+                #[cfg(feature = "luau-vector4")]
+                ffi::lua_pushvector(self.state(), 0., 0., 0., 0.);
+            }
+            ffi::LUA_TSTRING => {
+                ffi::lua_pushstring(self.state(), b"\0" as *const u8 as *const _);
+            }
+            ffi::LUA_TFUNCTION => {
+                unsafe extern "C-unwind" fn func(_state: *mut ffi::lua_State) -> c_int {
+                    0
+                }
+                ffi::lua_pushcfunction(self.state(), func);
+            }
+            ffi::LUA_TTHREAD => {
+                ffi::lua_pushthread(self.state());
+            }
+            #[cfg(feature = "luau")]
+            ffi::LUA_TBUFFER => {
+                ffi::lua_newbuffer(self.state(), 0);
+            }
+            _ => return false,
+        }
+        true
+    }
+
    /// Pushes a value that implements `IntoLua` onto the Lua stack.
    ///
    /// Uses up to 2 stack spaces to push a single value, does not call `checkstack`.
@@ -1247,7 +1287,7 @@ impl RawLua {
            }
        }

-        unsafe extern "C-unwind" fn call_callback(state: *mut ffi::lua_State) -> c_int {
+        unsafe extern "C-unwind" fn get_future_callback(state: *mut ffi::lua_State) -> c_int {
            // Async functions cannot be scoped and therefore destroyed,
            // so the first upvalue is always valid
            let upvalue = get_userdata::<AsyncCallbackUpvalue>(state, ffi::lua_upvalueindex(1));
@@ -1261,37 +1301,31 @@ impl RawLua {
                let extra = XRc::clone(&(*upvalue).extra);
                let protect = !rawlua.unlikely_memory_error();
                push_internal_userdata(state, AsyncPollUpvalue { data: fut, extra }, protect)?;
-                if protect {
-                    protect_lua!(state, 1, 1, fn(state) {
-                        ffi::lua_pushcclosure(state, poll_future, 1);
-                    })?;
-                } else {
-                    ffi::lua_pushcclosure(state, poll_future, 1);
-                }

                Ok(1)
            })
        }

        unsafe extern "C-unwind" fn poll_future(state: *mut ffi::lua_State) -> c_int {
-            let upvalue = get_userdata::<AsyncPollUpvalue>(state, ffi::lua_upvalueindex(1));
-            callback_error_ext(state, (*upvalue).extra.get(), true, |extra, nargs| {
+            // Future is always passed in the first argument
+            let future = get_userdata::<AsyncPollUpvalue>(state, 1);
+            callback_error_ext(state, (*future).extra.get(), true, |extra, nargs| {
                // Lua ensures that `LUA_MINSTACK` stack spaces are available (after pushing arguments)
                // The lock must be already held as the future is polled
                let rawlua = (*extra).raw_lua();

-                if nargs == 1 && ffi::lua_tolightuserdata(state, -1) == Lua::poll_terminate().0 {
+                if nargs == 2 && ffi::lua_tolightuserdata(state, -1) == Lua::poll_terminate().0 {
                    // Destroy the future and terminate the Lua thread
-                    (*upvalue).data.take();
+                    (*future).data.take();
                    ffi::lua_pushinteger(state, -1);
                    return Ok(1);
                }

-                let fut = &mut (*upvalue).data;
+                let fut = &mut (*future).data;
                let mut ctx = Context::from_waker(rawlua.waker());
                match fut.as_mut().map(|fut| fut.as_mut().poll(&mut ctx)) {
                    Some(Poll::Pending) => {
-                        let fut_nvals = ffi::lua_gettop(state);
+                        let fut_nvals = ffi::lua_gettop(state) - 1; // Exclude the future itself
                        if fut_nvals >= 3 && ffi::lua_tolightuserdata(state, -3) == Lua::poll_yield().0 {
                            // We have some values to yield
                            ffi::lua_pushnil(state);
@@ -1326,7 +1360,7 @@ impl RawLua {
        }

        let state = self.state();
-        let get_poll = unsafe {
+        let get_future = unsafe {
            let _sg = StackGuard::new(state);
            check_stack(state, 4)?;

@@ -1336,10 +1370,10 @@ impl RawLua {
            push_internal_userdata(state, upvalue, protect)?;
            if protect {
                protect_lua!(state, 1, 1, fn(state) {
-                    ffi::lua_pushcclosure(state, call_callback, 1);
+                    ffi::lua_pushcclosure(state, get_future_callback, 1);
                })?;
            } else {
-                ffi::lua_pushcclosure(state, call_callback, 1);
+                ffi::lua_pushcclosure(state, get_future_callback, 1);
            }

            Function(self.pop_ref())
@@ -1358,15 +1392,17 @@ impl RawLua {
        let coroutine = lua.globals().get::<Table>("coroutine")?;

        // Prepare environment for the async poller
-        let env = lua.create_table_with_capacity(0, 3)?;
-        env.set("get_poll", get_poll)?;
+        let env = lua.create_table_with_capacity(0, 4)?;
+        env.set("get_future", get_future)?;
+        env.set("poll", unsafe { lua.create_c_function(poll_future)? })?;
        env.set("yield", coroutine.get::<Function>("yield")?)?;
        env.set("unpack", unsafe { lua.create_c_function(unpack)? })?;

        lua.load(
            r#"
-            local poll = get_poll(...)
-            local nres, res, res2 = poll()
+            local poll, yield = poll, yield
+            local future = get_future(...)
+            local nres, res, res2 = poll(future)
            while true do
                -- Poll::Ready branch, `nres` is the number of results
                if nres ~= nil then
@@ -1390,13 +1426,13 @@ impl RawLua {
                    -- `res` is a "pending" value
                    -- `yield` can return a signal to drop the future that we should propagate
                    -- to the poller
-                    nres, res, res2 = poll(yield(res))
+                    nres, res, res2 = poll(future, yield(res))
                elseif res2 == 0 then
-                    nres, res, res2 = poll(yield())
+                    nres, res, res2 = poll(future, yield())
                elseif res2 == 1 then
-                    nres, res, res2 = poll(yield(res))
+                    nres, res, res2 = poll(future, yield(res))
                else
-                    nres, res, res2 = poll(yield(unpack(res, res2)))
+                    nres, res, res2 = poll(future, yield(unpack(res, res2)))
                end
            end
            "#,
@@ -1,14 +1,14 @@
 use std::collections::HashSet;
 use std::fmt;
 use std::marker::PhantomData;
-use std::os::raw::{c_int, c_void};
+use std::os::raw::c_void;
 use std::string::String as StdString;

 use crate::error::{Error, Result};
 use crate::function::Function;
 use crate::state::{LuaGuard, RawLua, WeakLua};
 use crate::traits::{FromLua, FromLuaMulti, IntoLua, IntoLuaMulti, ObjectLike};
-use crate::types::{Integer, LuaType, ValueRef};
+use crate::types::{Integer, ValueRef};
 use crate::util::{assert_stack, check_stack, get_metatable_ptr, StackGuard};
 use crate::value::{Nil, Value};

@@ -935,10 +935,6 @@ where
    }
 }

-impl LuaType for Table {
-    const TYPE_ID: c_int = ffi::LUA_TTABLE;
-}
-
 impl ObjectLike for Table {
    #[inline]
    fn get<V: FromLua>(&self, key: impl IntoLua) -> Result<V> {
@@ -120,6 +120,7 @@ pub trait MaybeSend: Send {}
 #[cfg(feature = "send")]
 impl<T: Send> MaybeSend for T {}

+/// A trait that adds `Send` requirement if `send` feature is enabled.
 #[cfg(not(feature = "send"))]
 pub trait MaybeSend {}
 #[cfg(not(feature = "send"))]
@@ -12,7 +12,7 @@ use crate::string::String;
 use crate::table::{Table, TablePairs};
 use crate::traits::{FromLua, FromLuaMulti, IntoLua, IntoLuaMulti};
 use crate::types::{MaybeSend, ValueRef};
-use crate::util::{check_stack, get_userdata, push_string, take_userdata, StackGuard};
+use crate::util::{check_stack, get_userdata, push_string, short_type_name, take_userdata, StackGuard};
 use crate::value::Value;

 #[cfg(feature = "async")]
@@ -273,6 +273,29 @@ pub trait UserDataMethods<T> {
        A: FromLuaMulti,
        R: IntoLuaMulti;

+    /// Add a method which accepts `T` as the first parameter.
+    ///
+    /// The userdata `T` will be moved out of the userdata container. This is useful for
+    /// methods that need to consume the userdata.
+    ///
+    /// The method can be called only once per userdata instance, subsequent calls will result in a
+    /// [`Error::UserDataDestructed`] error.
+    #[doc(hidden)]
+    fn add_method_once<M, A, R>(&mut self, name: impl Into<StdString>, method: M)
+    where
+        T: 'static,
+        M: Fn(&Lua, T, A) -> Result<R> + MaybeSend + 'static,
+        A: FromLuaMulti,
+        R: IntoLuaMulti,
+    {
+        let name = name.into();
+        let method_name = format!("{}.{name}", short_type_name::<T>());
+        self.add_function(name, move |lua, (ud, args): (AnyUserData, A)| {
+            let this = (ud.take()).map_err(|err| Error::bad_self_argument(&method_name, err))?;
+            method(lua, this, args)
+        });
+    }
+
    /// Add an async method which accepts a `&T` as the first parameter and returns [`Future`].
    ///
    /// Refer to [`add_method`] for more information about the implementation.
@@ -303,6 +326,34 @@ pub trait UserDataMethods<T> {
        MR: Future<Output = Result<R>> + MaybeSend + 'static,
        R: IntoLuaMulti;

+    /// Add an async method which accepts a `T` as the first parameter and returns [`Future`].
+    ///
+    /// The userdata `T` will be moved out of the userdata container. This is useful for
+    /// methods that need to consume the userdata.
+    ///
+    /// The method can be called only once per userdata instance, subsequent calls will result in a
+    /// [`Error::UserDataDestructed`] error.
+    #[cfg(feature = "async")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "async")))]
+    #[doc(hidden)]
+    fn add_async_method_once<M, A, MR, R>(&mut self, name: impl Into<StdString>, method: M)
+    where
+        T: 'static,
+        M: Fn(Lua, T, A) -> MR + MaybeSend + 'static,
+        A: FromLuaMulti,
+        MR: Future<Output = Result<R>> + MaybeSend + 'static,
+        R: IntoLuaMulti,
+    {
+        let name = name.into();
+        let method_name = format!("{}.{name}", short_type_name::<T>());
+        self.add_async_function(name, move |lua, (ud, args): (AnyUserData, A)| {
+            match (ud.take()).map_err(|err| Error::bad_self_argument(&method_name, err)) {
+                Ok(this) => either::Either::Left(method(lua, this, args)),
+                Err(err) => either::Either::Right(async move { Err(err) }),
+            }
+        });
+    }
+
    /// Add a regular method as a function which accepts generic arguments.
    ///
    /// The first argument will be a [`AnyUserData`] of type `T` if the method is called with Lua
@@ -921,8 +972,10 @@ impl AnyUserData {
        lua.get_userdata_ref_type_id(&self.0).ok().flatten()
    }

-    /// Returns a type name of this `UserData` (from a metatable field).
-    pub(crate) fn type_name(&self) -> Result<Option<StdString>> {
+    /// Returns a type name of this userdata (from a metatable field).
+    ///
+    /// If no type name is set, returns `None`.
+    pub fn type_name(&self) -> Result<Option<StdString>> {
        let lua = self.0.lua.lock();
        let state = lua.state();
        unsafe {
@@ -423,9 +423,9 @@ async fn test_async_thread_pool() -> Result<()> {

 #[tokio::test]
 async fn test_async_userdata() -> Result<()> {
-    struct MyUserData(u64);
+    struct MyUserdata(u64);

-    impl UserData for MyUserData {
+    impl UserData for MyUserdata {
        fn add_methods<M: UserDataMethods<Self>>(methods: &mut M) {
            methods.add_async_method("get_value", |_, data, ()| async move {
                sleep_ms(10).await;
@@ -438,6 +438,11 @@ async fn test_async_userdata() -> Result<()> {
                Ok(())
            });

+            methods.add_async_method_once("take_value", |_, data, ()| async move {
+                sleep_ms(10).await;
+                Ok(data.0)
+            });
+
            methods.add_async_function("sleep", |_, n| async move {
                sleep_ms(n).await;
                Ok(format!("elapsed:{}ms", n))
@@ -479,7 +484,7 @@ async fn test_async_userdata() -> Result<()> {
    let lua = Lua::new();
    let globals = lua.globals();

-    let userdata = lua.create_userdata(MyUserData(11))?;
+    let userdata = lua.create_userdata(MyUserdata(11))?;
    globals.set("userdata", &userdata)?;

    lua.load(
@@ -518,6 +523,21 @@ async fn test_async_userdata() -> Result<()> {
    #[cfg(not(any(feature = "lua51", feature = "luau")))]
    assert_eq!(userdata.call_async::<String>(()).await?, "elapsed:24ms");

+    // Take value
+    let userdata2 = lua.create_userdata(MyUserdata(0))?;
+    globals.set("userdata2", userdata2)?;
+    lua.load("assert(userdata:take_value() == 24)")
+        .exec_async()
+        .await?;
+    match lua.load("userdata2.take_value(userdata)").exec_async().await {
+        Err(Error::CallbackError { cause, .. }) => {
+            let err = cause.to_string();
+            assert!(err.contains("bad argument `self` to `MyUserdata.take_value`"));
+            assert!(err.contains("userdata has been destructed"));
+        }
+        r => panic!("expected Err(CallbackError), got {r:?}"),
+    }
+
    Ok(())
 }

@@ -21,6 +21,7 @@ fn test_chunk_methods() -> Result<()> {
 }

 #[test]
+#[cfg(not(target_os = "wasi"))]
 fn test_chunk_path() -> Result<()> {
    let lua = Lua::new();

@@ -470,5 +470,70 @@ fn test_typeof_error() -> Result<()> {
    Ok(())
 }

+#[test]
+fn test_memory_category() -> Result<()> {
+    let lua = Lua::new();
+
+    lua.set_memory_category("main").unwrap();
+
+    // Invalid category names should be rejected
+    let err = lua.set_memory_category("invalid$");
+    assert!(err.is_err());
+
+    for i in 0..254 {
+        let name = format!("category_{}", i);
+        lua.set_memory_category(&name).unwrap();
+    }
+    // 255th category should fail
+    let err = lua.set_memory_category("category_254");
+    assert!(err.is_err());
+
+    Ok(())
+}
+
+#[test]
+fn test_heap_dump() -> Result<()> {
+    let lua = Lua::new();
+
+    // Assign a new memory category and create few objects
+    lua.set_memory_category("test_category")?;
+    let _t = lua.create_table()?;
+    let _ud = lua.create_any_userdata("hello, world")?;
+
+    let dump = lua.heap_dump()?;
+
+    assert!(dump.size() > 0);
+    let size_by_category = dump.size_by_category();
+    assert_eq!(size_by_category.len(), 2);
+    assert!(size_by_category.contains_key("test_category"));
+    assert!(size_by_category["main"] < dump.size());
+
+    // Check size by type within the category
+    let size_by_type = dump.size_by_type(Some("test_category"));
+    assert!(!size_by_type.is_empty());
+    assert!(size_by_type.contains_key("table"));
+    assert!(size_by_type.contains_key("userdata"));
+    // Try non-existent category
+    let size_by_type2 = dump.size_by_type(Some("non_existent_category"));
+    assert!(size_by_type2.is_empty());
+    // Remove category filter
+    let size_by_type_all = dump.size_by_type(None);
+    assert!(size_by_type.len() < size_by_type_all.len());
+
+    // Check size by userdata type within the category
+    let size_by_udtype = dump.size_by_userdata(Some("test_category"));
+    assert_eq!(size_by_udtype.len(), 1);
+    assert!(size_by_udtype.contains_key("&str"));
+    assert_eq!(size_by_udtype["&str"].0, 1);
+    // Try non-existent category
+    let size_by_udtype2 = dump.size_by_userdata(Some("non_existent_category"));
+    assert!(size_by_udtype2.is_empty());
+    // Remove category filter
+    let size_by_udtype_all = dump.size_by_userdata(None);
+    assert!(size_by_udtype.len() < size_by_udtype_all.len());
+
+    Ok(())
+}
+
 #[path = "luau/require.rs"]
 mod require;
@@ -1,7 +1,7 @@
 use std::io::Result as IoResult;
 use std::result::Result as StdResult;

-use mlua::{Error, IntoLua, Lua, MultiValue, NavigateError, Require, Result, TextRequirer, Value};
+use mlua::{Error, FromLua, IntoLua, Lua, MultiValue, NavigateError, Require, Result, TextRequirer, Value};

 fn run_require(lua: &Lua, path: impl IntoLua) -> Result<Value> {
    lua.load(r#"return require(...)"#).call(path)
@@ -11,9 +11,14 @@ fn run_require_pcall(lua: &Lua, path: impl IntoLua) -> Result<MultiValue> {
    lua.load(r#"return pcall(require, ...)"#).call(path)
 }

+#[track_caller]
+fn get_value<V: FromLua>(value: &Value, key: impl IntoLua) -> V {
+    value.as_table().unwrap().get(key).unwrap()
+}
+
 #[track_caller]
 fn get_str(value: &Value, key: impl IntoLua) -> String {
-    value.as_table().unwrap().get::<String>(key).unwrap()
+    get_value(value, key)
 }

 #[test]
@@ -47,6 +52,16 @@ fn test_require_errors() {
    assert!(res.is_err());
    assert!((res.unwrap_err().to_string()).contains("require is not supported in this context"));

+    // RequireAliasThatDoesNotExist
+    let res = run_require(&lua, "@this.alias.does.not.exist");
+    assert!(res.is_err());
+    assert!((res.unwrap_err().to_string()).contains("@this.alias.does.not.exist is not a valid alias"));
+
+    // IllegalAlias
+    let res = run_require(&lua, "@");
+    assert!(res.is_err());
+    assert!((res.unwrap_err().to_string()).contains("@ is not a valid alias"));
+
    // Test throwing mlua::Error
    struct MyRequire(TextRequirer);

@@ -171,40 +186,64 @@ fn test_require_without_config() {
    assert!(res.is_table());
 }

-#[test]
-fn test_require_with_config() {
+fn test_require_with_config_inner(r#type: &str) {
    let lua = Lua::new();

+    let base_path = format!("./tests/luau/require/{type}");
+
    // RequirePathWithAlias
-    let res = run_require(&lua, "./tests/luau/require/with_config/src/alias_requirer").unwrap();
+    let res = run_require(&lua, format!("{base_path}/src/alias_requirer")).unwrap();
    assert_eq!("result from dependency", get_str(&res, 1));

    // RequirePathWithAlias (case-insensitive)
-    let res2 = run_require(&lua, "./tests/luau/require/with_config/src/alias_requirer_uc").unwrap();
+    let res2 = run_require(&lua, format!("{base_path}/src/alias_requirer_uc")).unwrap();
    assert_eq!("result from dependency", get_str(&res2, 1));
    assert_eq!(res.to_pointer(), res2.to_pointer());

    // RequirePathWithParentAlias
-    let res = run_require(&lua, "./tests/luau/require/with_config/src/parent_alias_requirer").unwrap();
+    let res = run_require(&lua, format!("{base_path}/src/parent_alias_requirer")).unwrap();
    assert_eq!("result from other_dependency", get_str(&res, 1));

    // RequirePathWithAliasPointingToDirectory
-    let res = run_require(
-        &lua,
-        "./tests/luau/require/with_config/src/directory_alias_requirer",
-    )
-    .unwrap();
+    let res = run_require(&lua, format!("{base_path}/src/directory_alias_requirer")).unwrap();
    assert_eq!("result from subdirectory_dependency", get_str(&res, 1));

-    // RequireAliasThatDoesNotExist
-    let res = run_require(&lua, "@this.alias.does.not.exist");
-    assert!(res.is_err());
-    assert!((res.unwrap_err().to_string()).contains("@this.alias.does.not.exist is not a valid alias"));
+    // RequireChainedAliasesSuccess
+    let res = run_require(
+        &lua,
+        format!("{base_path}/chained_aliases/subdirectory/successful_requirer"),
+    )
+    .unwrap();
+    assert_eq!("result from inner_dependency", get_str(&get_value(&res, 1), 1));
+    assert_eq!("result from outer_dependency", get_str(&get_value(&res, 2), 1));

-    // IllegalAlias
-    let res = run_require(&lua, "@");
+    // RequireChainedAliasesFailureCyclic
+    let res = run_require(
+        &lua,
+        format!("{base_path}/chained_aliases/subdirectory/failing_requirer_cyclic"),
+    );
    assert!(res.is_err());
-    assert!((res.unwrap_err().to_string()).contains("@ is not a valid alias"));
+    let err_msg = "error requiring module \"@cyclicentry\": detected alias cycle (@cyclic1 -> @cyclic2 -> @cyclic3 -> @cyclic1)";
+    assert!(res.unwrap_err().to_string().contains(err_msg));
+
+    // RequireChainedAliasesFailureMissing
+    let res = run_require(
+        &lua,
+        format!("{base_path}/chained_aliases/subdirectory/failing_requirer_missing"),
+    );
+    assert!(res.is_err());
+    let err_msg = "error requiring module \"@brokenchain\": @missing is not a valid alias";
+    assert!(res.unwrap_err().to_string().contains(err_msg));
+}
+
+#[test]
+fn test_require_with_config() {
+    test_require_with_config_inner("with_config");
+}
+
+#[test]
+fn test_require_with_config_luau() {
+    test_require_with_config_inner("with_config_luau");
 }

 #[cfg(all(feature = "async", not(windows)))]
@@ -0,0 +1,9 @@
+{
+    "aliases":{
+        "outer": "./",
+        "cyclicentry": "@cyclic1",
+        "cyclic1": "@cyclic2",
+        "cyclic2": "@cyclic3",
+        "cyclic3": "@cyclic1"
+    }
+}
@@ -0,0 +1 @@
+return {"result from outer_dependency"}
@@ -0,0 +1,10 @@
+{
+    "aliases":{
+        "passthroughinner": "./inner_dependency",
+        "passthroughouter": "@outer",
+        "dep": "@passthroughinner",
+        "outerdep": "@outer/outer_dependency",
+        "outerdir": "@passthroughouter",
+        "brokenchain": "@missing"
+    }
+}
@@ -0,0 +1 @@
+return require("@cyclicentry")
@@ -0,0 +1 @@
+return require("@brokenchain")
@@ -0,0 +1 @@
+return {"result from inner_dependency"}
@@ -0,0 +1,7 @@
+local result = {}
+
+table.insert(result, require("@dep"))
+table.insert(result, require("@outerdep"))
+table.insert(result, require("@outerdir/outer_dependency"))
+
+return result
@@ -0,0 +1,8 @@
+return {
+    luau = {
+        aliases = {
+            dep = "./this_should_be_overwritten_by_child_luaurc",
+            otherdep = "./src/other_dependency"
+        }
+    }
+}
@@ -0,0 +1,11 @@
+return {
+    luau = {
+        aliases = {
+            outer = "./",
+            cyclicentry = "@cyclic1",
+            cyclic1 = "@cyclic2",
+            cyclic2 = "@cyclic3",
+            cyclic3 = "@cyclic1"
+        }
+    }
+}
@@ -0,0 +1 @@
+return {"result from outer_dependency"}
@@ -0,0 +1,12 @@
+return {
+    luau = {
+        aliases = {
+            passthroughinner = "./inner_dependency",
+            passthroughouter = "@outer",
+            dep = "@passthroughinner",
+            outerdep = "@outer/outer_dependency",
+            outerdir = "@passthroughouter",
+            brokenchain = "@missing"
+        }
+    }
+}
@@ -0,0 +1 @@
+return require("@cyclicentry")
@@ -0,0 +1 @@
+return require("@brokenchain")
@@ -0,0 +1 @@
+return {"result from inner_dependency"}
@@ -0,0 +1,7 @@
+local result = {}
+
+table.insert(result, require("@dep"))
+table.insert(result, require("@outerdep"))
+table.insert(result, require("@outerdir/outer_dependency"))
+
+return result
@@ -0,0 +1,8 @@
+return {
+    luau = {
+        aliases = {
+            dep = "./dependency",
+            subdir = "./subdirectory"
+        }
+    }
+}
@@ -0,0 +1 @@
+return require("@dep")
@@ -0,0 +1 @@
+return require("@DeP")
@@ -0,0 +1 @@
+return {"result from dependency"}
@@ -0,0 +1 @@
+return(require("@subdir/subdirectory_dependency"))
@@ -0,0 +1 @@
+return {"result from other_dependency"}
@@ -0,0 +1 @@
+return require("@otherdep")
@@ -0,0 +1 @@
+return {"result from subdirectory_dependency"}
@@ -72,6 +72,26 @@ fn test_multivalue() {
    let _multi2 = MultiValue::from_vec(vec);
 }

+#[test]
+fn test_multivalue_by_ref() -> Result<()> {
+    let lua = Lua::new();
+    let multi = MultiValue::from_vec(vec![
+        Value::Integer(3),
+        Value::String(lua.create_string("hello")?),
+        Value::Boolean(true),
+    ]);
+
+    let f = lua.create_function(|_, (i, s, b): (i32, String, bool)| {
+        assert_eq!(i, 3);
+        assert_eq!(s.to_str()?, "hello");
+        assert_eq!(b, true);
+        Ok(())
+    })?;
+    f.call::<()>(&multi)?;
+
+    Ok(())
+}
+
 #[test]
 fn test_variadic() {
    let mut var = Variadic::with_capacity(3);
@@ -47,6 +47,7 @@ fn test_userdata_multithread_access_send_only() -> Result<()> {
    Ok(())
 }

+#[rustversion::stable]
 #[test]
 fn test_userdata_multithread_access_sync() -> Result<()> {
    let lua = Lua::new();
@@ -394,6 +394,7 @@ fn test_error() -> Result<()> {
 }

 #[test]
+#[cfg(not(panic = "abort"))]
 fn test_panic() -> Result<()> {
    fn make_lua(options: LuaOptions) -> Result<Lua> {
        let lua = Lua::new_with(StdLib::ALL_SAFE, options)?;
@@ -437,7 +438,7 @@ fn test_panic() -> Result<()> {
    {
        let lua = make_lua(LuaOptions::default())?;
        match catch_unwind(AssertUnwindSafe(|| -> Result<()> {
-            let _catched_panic = lua
+            let _caught_panic = lua
                .load(
                    r#"
                    -- Set global
@@ -897,6 +898,7 @@ fn test_registry_value_reuse() -> Result<()> {
 }

 #[test]
+#[cfg(not(panic = "abort"))]
 fn test_application_data() -> Result<()> {
    let lua = Lua::new();

@@ -1388,6 +1390,80 @@ fn test_inspect_stack() -> Result<()> {
    Ok(())
 }

+#[test]
+fn test_traceback() -> Result<()> {
+    let lua = Lua::new();
+
+    // Test traceback at level 0 (not inside any function)
+    let traceback = lua.traceback(None, 0)?.to_string_lossy();
+    assert!(traceback.contains("stack traceback:"));
+
+    // Test traceback with a message prefix
+    let traceback = lua.traceback(Some("error occurred"), 0)?.to_string_lossy();
+    assert!(traceback.starts_with("error occurred"));
+    assert!(traceback.contains("stack traceback:"));
+
+    // Test traceback inside a function
+    let get_traceback = lua.create_function(|lua, (msg, level): (Option<StdString>, usize)| {
+        lua.traceback(msg.as_deref(), level)
+    })?;
+    lua.globals().set("get_traceback", get_traceback)?;
+
+    lua.load(
+        r#"
+        local function foo()
+            -- Level 1 is inside foo (the caller)
+            local traceback = get_traceback(nil, 1)
+            return traceback
+        end
+        local function bar()
+            local result = foo()
+            return result
+        end
+        local function baz()
+            local result = bar()
+            return result
+        end
+
+        local traceback = baz()
+        assert(traceback:match("in %a+ 'foo'"))
+        assert(traceback:match("in %a+ 'bar'"))
+        assert(traceback:match("in %a+ 'baz'"))
+    "#,
+    )
+    .exec()?;
+
+    // Test traceback at different levels
+    lua.load(
+        r#"
+        local function foo()
+            local tb0 = get_traceback(nil, 0)
+            local tb1 = get_traceback(nil, 1)
+            local tb2 = get_traceback(nil, 2)
+            return tb0, tb1, tb2
+        end
+        local function bar()
+            local tb0, tb1, tb2 = foo()
+            return tb0, tb1, tb2
+        end
+
+        local tb0, tb1, tb2 = bar()
+
+        assert(tb0:match("in %a+ 'get_traceback'"))
+        assert(tb0:match("in %a+ 'foo'"))
+
+        assert(not tb1:match("in %a+ 'get_traceback'"))
+        assert(tb1:match("in %a+ 'foo'"))
+
+        assert(not tb2:match("in %a+ 'foo'"))
+        assert(tb1:match("in %a+ 'bar'"))
+    "#,
+    )
+    .exec()?;
+
+    Ok(())
+}
+
 #[test]
 fn test_multi_states() -> Result<()> {
    let lua = Lua::new();
@@ -199,6 +199,7 @@ fn test_coroutine_from_closure() -> Result<()> {
 }

 #[test]
+#[cfg(not(panic = "abort"))]
 fn test_coroutine_panic() {
    match catch_unwind(|| -> Result<()> {
        // check that coroutines propagate panics correctly
@@ -31,7 +31,9 @@ fn test_boolean_type_metatable() -> Result<()> {

    let mt = lua.create_table()?;
    mt.set("__add", Function::wrap(|a, b| Ok(a || b)))?;
-    lua.set_type_metatable::<bool>(Some(mt));
+    assert_eq!(lua.type_metatable::<bool>(), None);
+    lua.set_type_metatable::<bool>(Some(mt.clone()));
+    assert_eq!(lua.type_metatable::<bool>().unwrap(), mt);

    lua.load(r#"assert(true + true == true)"#).exec().unwrap();
    lua.load(r#"assert(true + false == true)"#).exec().unwrap();
@@ -52,7 +54,8 @@ fn test_lightuserdata_type_metatable() -> Result<()> {
            Ok(LightUserData((a.0 as usize + b.0 as usize) as *mut c_void))
        }),
    )?;
-    lua.set_type_metatable::<LightUserData>(Some(mt));
+    lua.set_type_metatable::<LightUserData>(Some(mt.clone()));
+    assert_eq!(lua.type_metatable::<LightUserData>().unwrap(), mt);

    let res = lua
        .load(
@@ -77,7 +80,9 @@ fn test_number_type_metatable() -> Result<()> {

    let mt = lua.create_table()?;
    mt.set("__call", Function::wrap(|n1: f64, n2: f64| Ok(n1 * n2)))?;
-    lua.set_type_metatable::<Number>(Some(mt));
+    lua.set_type_metatable::<Number>(Some(mt.clone()));
+    assert_eq!(lua.type_metatable::<Number>().unwrap(), mt);
+
    lua.load(r#"assert((1.5)(3.0) == 4.5)"#).exec().unwrap();
    lua.load(r#"assert((5)(5) == 25)"#).exec().unwrap();

@@ -93,7 +98,8 @@ fn test_string_type_metatable() -> Result<()> {
        "__add",
        Function::wrap(|a: String, b: String| Ok(format!("{a}{b}"))),
    )?;
-    lua.set_type_metatable::<LuaString>(Some(mt));
+    lua.set_type_metatable::<LuaString>(Some(mt.clone()));
+    assert_eq!(lua.type_metatable::<LuaString>().unwrap(), mt);

    lua.load(r#"assert(("foo" + "bar") == "foobar")"#).exec().unwrap();

@@ -109,7 +115,8 @@ fn test_function_type_metatable() -> Result<()> {
        "__index",
        Function::wrap(|_: Function, key: String| Ok(format!("function.{key}"))),
    )?;
-    lua.set_type_metatable::<Function>(Some(mt));
+    lua.set_type_metatable::<Function>(Some(mt.clone()));
+    assert_eq!(lua.type_metatable::<Function>(), Some(mt));

    lua.load(r#"assert((function() end).foo == "function.foo")"#)
        .exec()
@@ -127,7 +134,8 @@ fn test_thread_type_metatable() -> Result<()> {
        "__index",
        Function::wrap(|_: Thread, key: String| Ok(format!("thread.{key}"))),
    )?;
-    lua.set_type_metatable::<Thread>(Some(mt));
+    lua.set_type_metatable::<Thread>(Some(mt.clone()));
+    assert_eq!(lua.type_metatable::<Thread>(), Some(mt));

    lua.load(r#"assert((coroutine.create(function() end)).foo == "thread.foo")"#)
        .exec()
@@ -428,6 +428,39 @@ fn test_userdata_destroy() -> Result<()> {
    Ok(())
 }

+#[test]
+fn test_userdata_method_once() -> Result<()> {
+    struct MyUserdata(Arc<i64>);
+
+    impl UserData for MyUserdata {
+        fn add_methods<M: UserDataMethods<Self>>(methods: &mut M) {
+            methods.add_method_once("take_value", |_, this, ()| Ok(*this.0));
+        }
+    }
+
+    let lua = Lua::new();
+    let rc = Arc::new(42);
+    let userdata = lua.create_userdata(MyUserdata(rc.clone()))?;
+    lua.globals().set("userdata", &userdata)?;
+
+    // Control userdata
+    let userdata2 = lua.create_userdata(MyUserdata(rc.clone()))?;
+    lua.globals().set("userdata2", userdata2)?;
+
+    assert_eq!(lua.load("userdata:take_value()").eval::<i64>()?, 42);
+    match lua.load("userdata2.take_value(userdata)").eval::<i64>() {
+        Err(Error::CallbackError { cause, .. }) => {
+            let err = cause.to_string();
+            assert!(err.contains("bad argument `self` to `MyUserdata.take_value`"));
+            assert!(err.contains("userdata has been destructed"));
+        }
+        r => panic!("expected Err(CallbackError), got {r:?}"),
+    }
+    assert_eq!(Arc::strong_count(&rc), 2);
+
+    Ok(())
+}
+
 #[test]
 fn test_user_values() -> Result<()> {
    struct MyUserData;
@@ -924,6 +957,7 @@ fn test_nested_userdata_gc() -> Result<()> {
 }

 #[cfg(feature = "userdata-wrappers")]
+#[rustversion::stable]
 #[test]
 fn test_userdata_wrappers() -> Result<()> {
    #[derive(Debug)]
@@ -1,5 +1,5 @@
 [default]
-extend-ignore-identifiers-re = ["catched", "2nd", "ser"]
+extend-ignore-identifiers-re = ["2nd", "ser"]

 [default.extend-words]
 thr = "thr"
Author	SHA1	Message	Date
Alex Orlenko	0245d4ce6b	v0.11.5	2025-11-22 16:13:08 +00:00
Alex Orlenko	a7f105c698	Update `Lua::set_memory_category` doc	2025-11-22 14:27:02 +00:00
Alex Orlenko	d2a8670bef	(CI) Update wasi/wasmtime	2025-11-22 13:58:15 +00:00
Alex Orlenko	e9de70a030	(CI) Move from x86_64-apple-darwin to aarch64-apple-darwin	2025-11-22 13:57:04 +00:00
Alex Orlenko	aee647c6c0	Update CHANGELOG	2025-11-22 13:55:07 +00:00
Alex Orlenko	2e4184e7e4	Update spelling	2025-11-22 13:49:23 +00:00
Alex Orlenko	12b24b6c5b	mlua-sys: v0.9.0	2025-11-22 13:47:17 +00:00
Alex Orlenko	1b500b7d47	Remove generic from internal definition of `RawLua::create_string`	2025-11-22 13:36:50 +00:00
Alex Orlenko	ce4fc80e18	Bump luau-src to 0.17.0 (Luau 0.701)	2025-11-22 12:58:59 +00:00
Alex Orlenko	121971f54e	Add `Lua::set_memory_category` and `Lua::heap_dump` functions to profile Luau memory usage. This functionality uses Luau private api to dump heap mempory in JSON format for inspection. The new type `HeapDump` represents memory snapshot with some basic API to calculate stats.	2025-11-22 00:01:34 +00:00
Alex Orlenko	6835537e3b	Switch to released verson of luau0-src	2025-11-19 11:25:59 +00:00
Alex Orlenko	a2728928cf	Temporary disable some send tests on nightly Aparently there is a regression in the compiler and sync detection does not work correctly	2025-11-18 00:51:24 +00:00
Alex Orlenko	676f3a6983	Fix tests	2025-11-17 13:44:29 +00:00
Alex Orlenko	0beaac228c	Update Luau `require` tests	2025-11-16 23:51:51 +00:00
Alex Orlenko	9a7f75ad6b	Update `require` implementation to satisfy Luau 0.700	2025-11-16 23:13:11 +00:00
Alex Orlenko	cd56f92a7f	Update Luau definitions in mlua-sys to 0.700	2025-11-16 23:12:06 +00:00
Alex Orlenko	1bd1359f43	Exclude the first arg when checking for `yield_with` call. This is part of the previous commit	2025-11-06 23:28:37 +00:00
Alex Orlenko	feec72bcbd	Reduce number of allocations when calling async function Instead of creating a uniq poller with upvalue on each async call, return future directly and pass it to the poller This also gives about 3-5% perf improvements	2025-11-06 23:09:26 +00:00
Alex Orlenko	0611906c6a	Add `Lua::type_metatable` helper to get metatable of a primitive type. The accompany function `Lua::set_type_metatable` already exists.	2025-11-05 22:07:14 +00:00
Alex Orlenko	72ac247dca	Fix `MaybeSend` doc	2025-11-04 23:20:53 +00:00
Alex Orlenko	f2fd010c5f	Add missing `lua_remove` when discovering function name	2025-10-28 16:04:24 +00:00
Alex Orlenko	0619f264de	Add `Lua::traceback` function to generate stack traces at different levels This is similar to `debug.traceback`, through does not require debug module. Close #652	2025-10-28 14:49:22 +00:00
Alex Orlenko	ddd44bdd36	Add `LUA_LOADED_TABLE` constant (Luau)	2025-10-27 20:57:56 +00:00
Alex Orlenko	1152519074	Add `add_method_once` and `add_async_method_once` UserData methods (experimental). They will allow implementing userdata methods that can be called only once, destructing userdata instance during the call.	2025-10-26 20:14:46 +00:00
Alex Orlenko	3a2fd1ec59	Make `AnyUserData::type_name` public	2025-10-17 20:00:53 +01:00
Alex Orlenko	a4c8b20697	impl `IntoLuaMulti` for `&MultiValue`	2025-10-13 12:36:42 +01:00
Alex Crichton	6e353d6c9f	Build/test wasm32-wasip2 in CI (#649 ) This is a follow-up from mlua-rs/lua-src-rs#13 which verifies/tests that mlua/lua all work when compiled for a WASI target. While this doesn't have formal documentation yet it also codifies in CI configuration how to build for WASI and get tests passing (notably C compiler configuration and some misc Rust flags). This moves some `dev-dependencies` that don't compile for `wasm32-wasip2` to a different section of the manifest. This additionally annotates panicking tests with `#[cfg(not(panic = "abort"))]` to skip those tests on WASI. This does not test either the `send` or `async` feature at this time. Testing `send` requires threads which WASI does not yet support, and testing `async` requires more support in Tokio which is not currently there yet.	2025-10-04 09:52:23 +01:00
				`@@ -0,0 +1 @@`
				`return(require("@subdir/subdirectory_dependency"))`
				`@@ -0,0 +1 @@`
				`return {"result from subdirectory_dependency"}`