note: external requirements --> $DIR/escape-upvar-nested.rs:21:32 | LL | let mut closure1 = || p = &y; | ^^ | = note: defining type: test::{closure#0}::{closure#0} with closure substs [ i16, extern "rust-call" fn(()), (&'?1 mut &'?2 i32, &'?3 i32), ] = note: number of external vids: 4 = note: where '?3: '?2 note: external requirements --> $DIR/escape-upvar-nested.rs:20:27 | LL | let mut closure = || { | ^^ | = note: defining type: test::{closure#0} with closure substs [ i16, extern "rust-call" fn(()), (&'?1 mut &'?2 i32, &'?3 i32), ] = note: number of external vids: 4 = note: where '?3: '?2 note: no external requirements --> $DIR/escape-upvar-nested.rs:13:1 | LL | fn test() { | ^^^^^^^^^ | = note: defining type: test error[E0597]: `y` does not live long enough --> $DIR/escape-upvar-nested.rs:21:40 | LL | let mut closure = || { | -- value captured here LL | let mut closure1 = || p = &y; | ^ borrowed value does not live long enough ... LL | } | - `y` dropped here while still borrowed LL | LL | deref(p); | - borrow later used here error: aborting due to previous error For more information about this error, try `rustc --explain E0597`.