error: captured variable cannot escape `FnMut` closure body --> $DIR/issue-69446-fnmut-capture.rs:19:17 | LL | let mut x = Foo; | ----- variable defined here LL | bar(move || async { | _______________-_^ | | | | | inferred to be a `FnMut` closure LL | | x.foo(); | | - variable captured here LL | | }); | |_____^ returns an `async` block that contains a reference to a captured variable, which then escapes the closure body | = note: `FnMut` closures only have access to their captured variables while they are executing... = note: ...therefore, they cannot allow references to captured variables to escape error: aborting due to 1 previous error