| error: captured variable cannot escape `FnMut` closure body | |
| --> $DIR/issue-53040.rs:3:8 | |
| | | |
| LL | let mut v: Vec<()> = Vec::new(); | |
| | ----- variable defined here | |
| LL | || &mut v; | |
| | - ^^^^^- | |
| | | | | | |
| | | | variable captured here | |
| | | returns a reference to a captured variable which escapes the closure body | |
| | inferred to be a `FnMut` closure | |
| | | |
| = 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 | |