error[E0596]: cannot borrow `s` as mutable, as it is a captured variable in a `Fn` closure
  --> tests/compile/async_any_userdata_method.rs:9:49
   |
 8 |         let mut s = &s;
   |             ----- `s` declared here, outside the closure
 9 |         reg.add_async_method("t", |_, this, ()| async {
   |                                   ------------- ^^^^^ cannot borrow as mutable
   |                                   |
   |                                   in this closure
10 |             s = &*this;
   |             - mutable borrow occurs due to use of `s` in closure

error[E0373]: async block may outlive the current function, but it borrows `this`, which is owned by the current function
  --> tests/compile/async_any_userdata_method.rs:9:49
   |
 9 |         reg.add_async_method("t", |_, this, ()| async {
   |                                                 ^^^^^ may outlive borrowed value `this`
10 |             s = &*this;
   |                   ---- `this` is borrowed here
   |
note: async block is returned here
  --> tests/compile/async_any_userdata_method.rs:9:49
   |
 9 |           reg.add_async_method("t", |_, this, ()| async {
   |  _________________________________________________^
10 | |             s = &*this;
11 | |             Ok(())
12 | |         });
   | |_________^
help: to force the async block to take ownership of `this` (and any other referenced variables), use the `move` keyword
   |
 9 |         reg.add_async_method("t", |_, this, ()| async move {
   |                                                       ++++

error: lifetime may not live long enough
  --> tests/compile/async_any_userdata_method.rs:9:49
   |
 9 |           reg.add_async_method("t", |_, this, ()| async {
   |  ___________________________________-------------_^
   | |                                   |           |
   | |                                   |           return type of closure `{async block@$DIR/tests/compile/async_any_userdata_method.rs:9:49: 9:54}` contains a lifetime `'2`
   | |                                   lifetime `'1` represents this closure's body
10 | |             s = &*this;
11 | |             Ok(())
12 | |         });
   | |_________^ returning this value requires that `'1` must outlive `'2`
   |
   = note: closure implements `Fn`, so references to captured variables can't escape the closure

error[E0597]: `s` does not live long enough
  --> tests/compile/async_any_userdata_method.rs:8:21
   |
 7 |           let s = String::new();
   |               - binding `s` declared here
 8 |           let mut s = &s;
   |                       ^^ borrowed value does not live long enough
 9 | /         reg.add_async_method("t", |_, this, ()| async {
10 | |             s = &*this;
11 | |             Ok(())
12 | |         });
   | |__________- argument requires that `s` is borrowed for `'static`
13 |       })
   |       - `s` dropped here while still borrowed
   |
note: requirement that the value outlives `'static` introduced here
  --> src/userdata.rs
   |
   |         M: Fn(Lua, UserDataRef<T>, A) -> MR + MaybeSend + 'static,
   |                                                           ^^^^^^^

error[E0373]: closure may outlive the current function, but it borrows `s`, which is owned by the current function
  --> tests/compile/async_any_userdata_method.rs:9:35
   |
 9 |         reg.add_async_method("t", |_, this, ()| async {
   |                                   ^^^^^^^^^^^^^ may outlive borrowed value `s`
10 |             s = &*this;
   |             - `s` is borrowed here
   |
note: function requires argument type to outlive `'static`
  --> tests/compile/async_any_userdata_method.rs:9:9
   |
 9 | /         reg.add_async_method("t", |_, this, ()| async {
10 | |             s = &*this;
11 | |             Ok(())
12 | |         });
   | |__________^
help: to force the closure to take ownership of `s` (and any other referenced variables), use the `move` keyword
   |
 9 |         reg.add_async_method("t", move |_, this, ()| async {
   |                                   ++++