note: no external requirements --> $DIR/escape-argument-callee.rs:26:38 | LL | let mut closure = expect_sig(|p, y| *p = y); | ^^^^^^ | = note: defining type: test::{closure#0} with closure substs [ i16, for extern "rust-call" fn((&ReLateBound(DebruijnIndex(0), BoundRegion { var: 0, kind: BrAnon(None) }) mut &ReLateBound(DebruijnIndex(0), BoundRegion { var: 1, kind: BrAnon(None) }) i32, &ReLateBound(DebruijnIndex(0), BoundRegion { var: 2, kind: BrAnon(None) }) i32)), (), ] error: lifetime may not live long enough --> $DIR/escape-argument-callee.rs:26:45 | LL | let mut closure = expect_sig(|p, y| *p = y); | - - ^^^^^^ assignment requires that `'1` must outlive `'2` | | | | | has type `&'1 i32` | has type `&'?2 mut &'2 i32` note: no external requirements --> $DIR/escape-argument-callee.rs:20:1 | LL | fn test() { | ^^^^^^^^^ | = note: defining type: test error: aborting due to previous error