| error: captured variable cannot escape `FnMut` closure body | |
| --> $DIR/issue-40510-1.rs:11:9 | |
| | | |
| LL | || { | |
| | - inferred to be a `FnMut` closure | |
| LL | &mut x | |
| | ^^^^^^ returns a reference to a captured variable which 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 | |