note: External requirements --> $DIR/propagate-approximated-shorter-to-static-no-bound.rs:45:47 | LL | establish_relationships(&cell_a, &cell_b, |_outlives, x, y| { | _______________________________________________^ LL | | //~^ ERROR borrowed data escapes outside of function LL | | //~| ERROR unsatisfied lifetime constraints LL | | LL | | // Only works if 'x: 'y: LL | | demand_y(x, y, x.get()) LL | | }); | |_____^ | = note: defining type: DefId(0/1:18 ~ propagate_approximated_shorter_to_static_no_bound[317d]::supply[0]::{{closure}}[0]) with closure substs [ i16, for<'r, 's, 't0, 't1, 't2> extern "rust-call" fn((&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) std::cell::Cell<&'_#1r &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) u32>, &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't0)) std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) u32>, &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't1)) std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't2)) u32>)) ] = note: late-bound region ReFree(DefId(0/0:6 ~ propagate_approximated_shorter_to_static_no_bound[317d]::supply[0]), BrNamed(crate0:DefIndex(1:16), 'a)) is '_#2r = note: late-bound region ReFree(DefId(0/0:6 ~ propagate_approximated_shorter_to_static_no_bound[317d]::supply[0]), BrNamed(crate0:DefIndex(1:17), 'b)) 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:44:1 | 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 | | //~^ ERROR borrowed data escapes outside of function LL | | //~| ERROR unsatisfied lifetime constraints ... | LL | | }); LL | | } | |_^ | = note: defining type: DefId(0/0:6 ~ propagate_approximated_shorter_to_static_no_bound[317d]::supply[0]) with substs [] error: borrowed data escapes outside of function --> $DIR/propagate-approximated-shorter-to-static-no-bound.rs:45:5 | 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 | | //~^ ERROR borrowed data escapes outside of function LL | | //~| ERROR unsatisfied lifetime constraints LL | | LL | | // Only works if 'x: 'y: LL | | demand_y(x, y, x.get()) LL | | }); | |______^ `cell_a` escapes the function body here error: unsatisfied lifetime constraints --> $DIR/propagate-approximated-shorter-to-static-no-bound.rs:45:29 | LL | fn supply<'a, 'b>(cell_a: Cell<&'a u32>, cell_b: Cell<&'b u32>) { | -- -- lifetime `'b` defined here | | | lifetime `'a` defined here LL | establish_relationships(&cell_a, &cell_b, |_outlives, x, y| { | ^^^^^^^ requires that `'a` must outlive `'b` error: aborting due to 2 previous errors