src/test/ui/nll/closure-requirements/propagate-approximated-shorter-to-static-wrong-bound.stderr

   1 note: External requirements
   2   --> $DIR/propagate-approximated-shorter-to-static-wrong-bound.rs:48:47
   3    |
   4 LL |       establish_relationships(&cell_a, &cell_b, |_outlives1, _outlives2, x, y| {
   5    |  _______________________________________________^
   6 LL | |         //~^ ERROR borrowed data escapes outside of function
   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_shorter_to_static_wrong_bound[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<&'_#2r &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't1)) 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: '_#0r
  21
  22 note: No external requirements
  23   --> $DIR/propagate-approximated-shorter-to-static-wrong-bound.rs:47:1
  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 | |         //~^ ERROR borrowed data escapes outside of function
  28 LL | |         // Only works if 'x: 'y:
  29 ...  |
  30 LL | |     });
  31 LL | | }
  32    | |_^
  33    |
  34    = note: defining type: DefId(0/0:6 ~ propagate_approximated_shorter_to_static_wrong_bound[317d]::supply[0]) with substs []
  35
  36 error[E0521]: borrowed data escapes outside of function
  37   --> $DIR/propagate-approximated-shorter-to-static-wrong-bound.rs:48:5
  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, |_outlives1, _outlives2, x, y| {
  42 LL | |         //~^ ERROR borrowed data escapes outside of function
  43 LL | |         // Only works if 'x: 'y:
  44 LL | |         demand_y(x, y, x.get())
  45 LL | |         //~^ ERROR unsatisfied lifetime constraints
  46 LL | |     });
  47    | |______^ `cell_a` escapes the function body here
  48
  49 error: unsatisfied lifetime constraints
  50   --> $DIR/propagate-approximated-shorter-to-static-wrong-bound.rs:51:9
  51    |
  52 LL | fn supply<'a, 'b>(cell_a: Cell<&'a u32>, cell_b: Cell<&'b u32>) {
  53    |           --  -- lifetime `'b` defined here
  54    |           |
  55    |           lifetime `'a` defined here
  56 ...
  57 LL |         demand_y(x, y, x.get())
  58    |         ^^^^^^^^^^^^^^^^^^^^^^^ argument requires that `'a` must outlive `'b`
  59
  60 error: aborting due to 2 previous errors
  61
  62 For more information about this error, try `rustc --explain E0521`.