error: lifetime may not live long enough
  --> tests/compile/async_any_userdata_method.rs:9:58
   |
9  |           reg.add_async_method("t", |_, this: &String, ()| async {
   |  ___________________________________----------------------_^
   | |                                   |                    |
   | |                                   |                    return type of closure `{async block@$DIR/tests/compile/async_any_userdata_method.rs:9:58: 12:10}` 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[E0596]: cannot borrow `s` as mutable, as it is a captured variable in a `Fn` closure
  --> tests/compile/async_any_userdata_method.rs:9:58
   |
9  |           reg.add_async_method("t", |_, this: &String, ()| async {
   |  __________________________________________________________^
10 | |             s = this;
   | |             - mutable borrow occurs due to use of `s` in closure
11 | |             Ok(())
12 | |         });
   | |_________^ cannot borrow as mutable

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: &String, ()| async {
10 | |             s = this;
11 | |             Ok(())
12 | |         });
   | |__________- argument requires that `s` is borrowed for `'static`
13 |       }).unwrap();
   |       - `s` dropped here while still borrowed

error[E0521]: borrowed data escapes outside of closure
  --> tests/compile/async_any_userdata_method.rs:9:9
   |
6  |       lua.register_userdata_type::<String>(|reg| {
   |                                             ---
   |                                             |
   |                                             `reg` is a reference that is only valid in the closure body
   |                                             has type `&mut LuaUserDataRegistry<'1, std::string::String>`
...
9  | /         reg.add_async_method("t", |_, this: &String, ()| async {
10 | |             s = this;
11 | |             Ok(())
12 | |         });
   | |          ^
   | |          |
   | |__________`reg` escapes the closure body here
   |            argument requires that `'1` must outlive `'static`
   |
   = note: requirement occurs because of a mutable reference to `LuaUserDataRegistry<'_, std::string::String>`
   = note: mutable references are invariant over their type parameter
   = help: see <https://doc.rust-lang.org/nomicon/subtyping.html> for more information about variance

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: &String, ()| 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: &String, ()| 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: &String, ()| async {
   |                                   ++++