error[E0373]: closure may outlive the current function, but it borrows `test.field`, which is owned by the current function
  --> tests/compile/scope_invariance.rs:13:39
   |
 9 |     lua.scope(|scope| {
   |                ----- has type `&'1 mlua::Scope<'1, '_>`
...
13 |             scope.create_function_mut(|_, ()| {
   |                                       ^^^^^^^ may outlive borrowed value `test.field`
14 |                 test.field = 42;
   |                 ---------- `test.field` is borrowed here
   |
note: function requires argument type to outlive `'1`
  --> tests/compile/scope_invariance.rs:13:13
   |
13 | /             scope.create_function_mut(|_, ()| {
14 | |                 test.field = 42;
15 | |                 //~^ error: `test` does not live long enough
16 | |                 Ok(())
17 | |             })?
   | |______________^
help: to force the closure to take ownership of `test.field` (and any other referenced variables), use the `move` keyword
   |
13 |             scope.create_function_mut(move |_, ()| {
   |                                       ++++