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

   1 note: External requirements
   2   --> $DIR/propagate-approximated-ref.rs:53:47
   3    |
   4 LL |       establish_relationships(&cell_a, &cell_b, |_outlives1, _outlives2, x, y| {
   5    |  _______________________________________________^
   6 LL | |
   7 LL | |         // Only works if 'x: 'y:
   8 LL | |         demand_y(x, y, x.get())
   9 LL | |         //~^ ERROR unsatisfied lifetime constraints
  10 LL | |     });
  11    | |_____^
  12    |
  13    = note: defining type: DefId(0/1:18 ~ propagate_approximated_ref[317d]::supply[0]::{{closure}}[0]) with closure substs [
  14                i16,
  15                for<'r, 's, 't0, 't1, 't2, 't3> 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), 't1)) &'_#2r u32>, &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't2)) std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) u32>, &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't3)) std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't1)) u32>))
  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-ref.rs:52:1
  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, |_outlives1, _outlives2, x, y| {
  27 LL | |
  28 LL | |         // Only works if 'x: 'y:
  29 ...  |
  30 LL | |     });
  31 LL | | }
  32    | |_^
  33    |
  34    = note: defining type: DefId(0/0:6 ~ propagate_approximated_ref[317d]::supply[0]) with substs []
  35
  36 error: unsatisfied lifetime constraints
  37   --> $DIR/propagate-approximated-ref.rs:56:9
  38    |
  39 LL | fn supply<'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(x, y, x.get())
  45    |         ^^^^^^^^^^^^^^^^^^^^^^^ argument requires that `'a` must outlive `'b`
  46
  47 error: aborting due to previous error
  48