note: external requirements --> $DIR/escape-upvar-ref.rs:23:27 | LL | let mut closure = || p = &y; | ^^ | = note: defining type: test::{closure#0} with closure substs [ i16, extern "rust-call" fn(()), (&'_#1r mut &'_#2r i32, &'_#3r i32), ] = note: number of external vids: 4 = note: where '_#3r: '_#2r note: no external requirements --> $DIR/escape-upvar-ref.rs:17:1 | LL | fn test() { | ^^^^^^^^^ | = note: defining type: test error[E0597]: `y` does not live long enough --> $DIR/escape-upvar-ref.rs:23:35 | LL | let mut closure = || p = &y; | -- ^ borrowed value does not live long enough | | | value captured here ... 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`.