diff --git a/src/chunk.rs b/src/chunk.rs
index d54b385..0dc781d 100644
--- a/src/chunk.rs
+++ b/src/chunk.rs
@@ -134,7 +134,7 @@ pub struct Compiler {
 #[cfg(any(feature = "luau", doc))]
 impl Default for Compiler {
     fn default() -> Self {
-        Self::new()
+        const { Self::new() }
     }
 }
 
@@ -323,8 +323,8 @@ impl<'a> Chunk<'a> {
     /// necessary to populate the environment in order for scripts using custom environments to be
     /// useful.
     pub fn set_environment(mut self, env: impl IntoLua) -> Self {
-        let lua = self.lua.lock();
-        let lua = lua.lua();
+        let guard = self.lua.lock();
+        let lua = guard.lua();
         self.env = env
             .into_lua(lua)
             .and_then(|val| lua.unpack(val))
@@ -357,8 +357,7 @@ impl<'a> Chunk<'a> {
     ///
     /// This is equivalent to calling the chunk function with no arguments and no return values.
     pub fn exec(self) -> Result<()> {
-        self.call::<()>(())?;
-        Ok(())
+        self.call(())
     }
 
     /// Asynchronously execute this chunk of code.
diff --git a/src/multi.rs b/src/multi.rs
index c631ccd..29d2f38 100644
--- a/src/multi.rs
+++ b/src/multi.rs
@@ -141,7 +141,7 @@ impl<T> Variadic<T> {
 
 impl<T> Default for Variadic<T> {
     fn default() -> Variadic<T> {
-        Variadic::new()
+        const { Variadic::new() }
     }
 }
 
diff --git a/src/serde/de.rs b/src/serde/de.rs
index 0d72d83..c54241a 100644
--- a/src/serde/de.rs
+++ b/src/serde/de.rs
@@ -51,7 +51,7 @@ pub struct Options {
 
 impl Default for Options {
     fn default() -> Self {
-        Self::new()
+        const { Self::new() }
     }
 }
 
diff --git a/src/serde/ser.rs b/src/serde/ser.rs
index 0267db7..3f20743 100644
--- a/src/serde/ser.rs
+++ b/src/serde/ser.rs
@@ -52,7 +52,7 @@ pub struct Options {
 
 impl Default for Options {
     fn default() -> Self {
-        Self::new()
+        const { Self::new() }
     }
 }
 
diff --git a/src/state.rs b/src/state.rs
index 3d3c096..c8ba1f5 100644
--- a/src/state.rs
+++ b/src/state.rs
@@ -104,7 +104,7 @@ pub struct LuaOptions {
 
 impl Default for LuaOptions {
     fn default() -> Self {
-        LuaOptions::new()
+        const { LuaOptions::new() }
     }
 }
 
@@ -1251,7 +1251,7 @@ impl Lua {
     ///
     /// This methods provides a way to add fields or methods to userdata objects of a type `T`.
     pub fn register_userdata_type<T: 'static>(&self, f: impl FnOnce(&mut UserDataRegistry<T>)) -> Result<()> {
-        let mut registry = UserDataRegistry::new();
+        let mut registry = const { UserDataRegistry::new() };
         f(&mut registry);
 
         let lua = self.lock();
diff --git a/src/state/raw.rs b/src/state/raw.rs
index d489576..c10ccc8 100644
--- a/src/state/raw.rs
+++ b/src/state/raw.rs
@@ -723,7 +723,7 @@ impl RawLua {
             }
 
             // Create a new metatable from `UserData` definition
-            let mut registry = UserDataRegistry::new();
+            let mut registry = const { UserDataRegistry::new() };
             T::register(&mut registry);
 
             self.register_userdata_metatable(registry)
@@ -742,7 +742,7 @@ impl RawLua {
             }
 
             // Create an empty metatable
-            let registry = UserDataRegistry::new();
+            let registry = const { UserDataRegistry::new() };
             self.register_userdata_metatable::<T>(registry)
         })
     }