src/test/ui/nll/closure-requirements/propagate-approximated-shorter-to-static-no-bound.stderr

   1 note: External requirements
   2   --> $DIR/propagate-approximated-shorter-to-static-no-bound.rs:32:47
   3    |
   4 LL |       establish_relationships(&cell_a, &cell_b, |_outlives, x, y| {
   5    |  _______________________________________________^
   6 LL | |
   7 LL | |
   8 LL | |         // Only works if 'x: 'y:
   9 LL | |         demand_y(x, y, x.get())
  10 LL | |     });
  11    | |_____^
  12    |
  13    = note: defining type: DefId(0:16 ~ propagate_approximated_shorter_to_static_no_bound[317d]::supply[0]::{{closure}}[0]) with closure substs [
  14                i16,
  15                for<'r, 's, 't0, 't1, 't2> extern "rust-call" fn((&ReLateBound(DebruijnIndex(0), BrNamed('r)) std::cell::Cell<&'_#1r &ReLateBound(DebruijnIndex(0), BrNamed('s)) u32>, &ReLateBound(DebruijnIndex(0), BrNamed('t0)) std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed('s)) u32>, &ReLateBound(DebruijnIndex(0), BrNamed('t1)) std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed('t2)) u32>)),
  16            ]
  17    = note: late-bound region is '_#2r
  18    = note: late-bound region is '_#3r
  19    = note: number of external vids: 4
  20    = note: where '_#1r: '_#0r
  21
  22 note: No external requirements
  23   --> $DIR/propagate-approximated-shorter-to-static-no-bound.rs:31:1
  24    |
  25 LL | / fn supply<'a, 'b>(cell_a: Cell<&'a u32>, cell_b: Cell<&'b u32>) {
  26 LL | |     establish_relationships(&cell_a, &cell_b, |_outlives, x, y| {
  27 LL | |
  28 LL | |
  29 ...  |
  30 LL | |     });
  31 LL | | }
  32    | |_^
  33    |
  34    = note: defining type: DefId(0:13 ~ propagate_approximated_shorter_to_static_no_bound[317d]::supply[0]) with substs []
  35
  36 error[E0521]: borrowed data escapes outside of function
  37   --> $DIR/propagate-approximated-shorter-to-static-no-bound.rs:32:5
  38    |
  39 LL |   fn supply<'a, 'b>(cell_a: Cell<&'a u32>, cell_b: Cell<&'b u32>) {
  40    |                     ------ `cell_a` is a reference that is only valid in the function body
  41 LL | /     establish_relationships(&cell_a, &cell_b, |_outlives, x, y| {
  42 LL | |
  43 LL | |
  44 LL | |         // Only works if 'x: 'y:
  45 LL | |         demand_y(x, y, x.get())
  46 LL | |     });
  47    | |______^ `cell_a` escapes the function body here
  48    |
  49    = help: consider replacing `'a` with `'static`
  50
  51 error: aborting due to previous error
  52