src/test/ui/nll/closure-requirements/propagate-approximated-val.stderr

   1 note: external requirements
   2   --> $DIR/propagate-approximated-val.rs:36:45
   3    |
   4 LL |       establish_relationships(cell_a, cell_b, |outlives1, outlives2, x, y| {
   5    |  _____________________________________________^
   6 LL | |         // Only works if 'x: 'y:
   7 LL | |         demand_y(outlives1, outlives2, x.get())
   8 LL | |
   9 LL | |     });
  10    | |_____^
  11    |
  12    = note: defining type: test::{{closure}}#0 with closure substs [
  13                i16,
  14                for<'r, 's> extern "rust-call" fn((std::cell::Cell<&'_#1r &ReLateBound(DebruijnIndex(0), BrNamed('r)) u32>, std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed('s)) &'_#2r u32>, std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed('r)) u32>, std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed('s)) u32>)),
  15                (),
  16            ]
  17    = note: late-bound region is '_#3r
  18    = note: late-bound region is '_#4r
  19    = note: number of external vids: 5
  20    = note: where '_#1r: '_#2r
  21
  22 note: no external requirements
  23   --> $DIR/propagate-approximated-val.rs:35:1
  24    |
  25 LL | / fn test<'a, 'b>(cell_a: Cell<&'a u32>, cell_b: Cell<&'b u32>) {
  26 LL | |     establish_relationships(cell_a, cell_b, |outlives1, outlives2, x, y| {
  27 LL | |         // Only works if 'x: 'y:
  28 LL | |         demand_y(outlives1, outlives2, x.get())
  29 LL | |
  30 LL | |     });
  31 LL | | }
  32    | |_^
  33    |
  34    = note: defining type: test
  35
  36 error: lifetime may not live long enough
  37   --> $DIR/propagate-approximated-val.rs:38:9
  38    |
  39 LL | fn test<'a, 'b>(cell_a: Cell<&'a u32>, cell_b: Cell<&'b u32>) {
  40    |         --  -- lifetime `'b` defined here
  41    |         |
  42    |         lifetime `'a` defined here
  43 ...
  44 LL |         demand_y(outlives1, outlives2, x.get())
  45    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ argument requires that `'a` must outlive `'b`
  46    |
  47    = help: consider adding the following bound: `'a: 'b`
  48
  49 error: aborting due to previous error
  50