note: External requirements
  --> $DIR/propagate-approximated-val.rs:36:45
   |
LL |       establish_relationships(cell_a, cell_b, |outlives1, outlives2, x, y| {
   |  _____________________________________________^
LL | |         // Only works if 'x: 'y:
LL | |         demand_y(outlives1, outlives2, x.get())
LL | |
LL | |     });
   | |_____^
   |
   = note: defining type: test::{{closure}}#0 with closure substs [
               i16,
               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>)),
           ]
   = note: late-bound region is '_#3r
   = note: late-bound region is '_#4r
   = note: number of external vids: 5
   = note: where '_#1r: '_#2r

note: No external requirements
  --> $DIR/propagate-approximated-val.rs:35:1
   |
LL | / fn test<'a, 'b>(cell_a: Cell<&'a u32>, cell_b: Cell<&'b u32>) {
LL | |     establish_relationships(cell_a, cell_b, |outlives1, outlives2, x, y| {
LL | |         // Only works if 'x: 'y:
LL | |         demand_y(outlives1, outlives2, x.get())
LL | |
LL | |     });
LL | | }
   | |_^
   |
   = note: defining type: test

error: lifetime may not live long enough
  --> $DIR/propagate-approximated-val.rs:38:9
   |
LL | fn test<'a, 'b>(cell_a: Cell<&'a u32>, cell_b: Cell<&'b u32>) {
   |         --  -- lifetime `'b` defined here
   |         |
   |         lifetime `'a` defined here
...
LL |         demand_y(outlives1, outlives2, x.get())
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ argument requires that `'a` must outlive `'b`
   |
   = help: consider adding the following bound: `'a: 'b`

error: aborting due to previous error