note: external requirements --> $DIR/propagate-approximated-shorter-to-static-no-bound.rs:32:47 | LL | establish_relationships(&cell_a, &cell_b, |_outlives, x, y| { | _______________________________________________^ LL | | LL | | LL | | // Only works if 'x: 'y: LL | | demand_y(x, y, x.get()) LL | | }); | |_____^ | = note: defining type: supply::{closure#0} with closure substs [ i16, for<'r, 's, 't0, 't1, 't2> extern "rust-call" fn((&ReLateBound(DebruijnIndex(0), BoundRegion { kind: BrNamed('r) }) std::cell::Cell<&'_#1r &ReLateBound(DebruijnIndex(0), BoundRegion { kind: BrNamed('s) }) u32>, &ReLateBound(DebruijnIndex(0), BoundRegion { kind: BrNamed('t0) }) std::cell::Cell<&ReLateBound(DebruijnIndex(0), BoundRegion { kind: BrNamed('s) }) u32>, &ReLateBound(DebruijnIndex(0), BoundRegion { kind: BrNamed('t1) }) std::cell::Cell<&ReLateBound(DebruijnIndex(0), BoundRegion { kind: BrNamed('t2) }) u32>)), (), ] = note: late-bound region is '_#2r = note: late-bound region is '_#3r = note: number of external vids: 4 = note: where '_#1r: '_#0r note: no external requirements --> $DIR/propagate-approximated-shorter-to-static-no-bound.rs:31:1 | LL | / fn supply<'a, 'b>(cell_a: Cell<&'a u32>, cell_b: Cell<&'b u32>) { LL | | establish_relationships(&cell_a, &cell_b, |_outlives, x, y| { LL | | LL | | ... | LL | | }); LL | | } | |_^ | = note: defining type: supply error[E0521]: borrowed data escapes outside of function --> $DIR/propagate-approximated-shorter-to-static-no-bound.rs:32:5 | LL | fn supply<'a, 'b>(cell_a: Cell<&'a u32>, cell_b: Cell<&'b u32>) { | ------ `cell_a` is a reference that is only valid in the function body LL | / establish_relationships(&cell_a, &cell_b, |_outlives, x, y| { LL | | LL | | LL | | // Only works if 'x: 'y: LL | | demand_y(x, y, x.get()) LL | | }); | |______^ `cell_a` escapes the function body here | = help: consider replacing `'a` with `'static` error: aborting due to previous error