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: supply::{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            ]
  18    = note: late-bound region is '_#2r
  19    = note: late-bound region is '_#3r
  20    = note: number of external vids: 4
  21    = note: where '_#1r: '_#0r
  22
  23 note: no external requirements
  24   --> $DIR/propagate-approximated-shorter-to-static-no-bound.rs:31:1
  25    |
  26 LL | / fn supply<'a, 'b>(cell_a: Cell<&'a u32>, cell_b: Cell<&'b u32>) {
  27 LL | |     establish_relationships(&cell_a, &cell_b, |_outlives, x, y| {
  28 LL | |
  29 LL | |
  30 ...  |
  31 LL | |     });
  32 LL | | }
  33    | |_^
  34    |
  35    = note: defining type: supply
  36
  37 error[E0521]: borrowed data escapes outside of function
  38   --> $DIR/propagate-approximated-shorter-to-static-no-bound.rs:32:5
  39    |
  40 LL |   fn supply<'a, 'b>(cell_a: Cell<&'a u32>, cell_b: Cell<&'b u32>) {
  41    |                     ------ `cell_a` is a reference that is only valid in the function body
  42 LL | /     establish_relationships(&cell_a, &cell_b, |_outlives, x, y| {
  43 LL | |
  44 LL | |
  45 LL | |         // Only works if 'x: 'y:
  46 LL | |         demand_y(x, y, x.get())
  47 LL | |     });
  48    | |______^ `cell_a` escapes the function body here
  49    |
  50    = help: consider replacing `'a` with `'static`
  51
  52 error: aborting due to previous error
  53