src/test/ui/nll/closure-requirements/propagate-approximated-shorter-to-static-comparing-against-free.stderr

   1 note: no external requirements
   2   --> $DIR/propagate-approximated-shorter-to-static-comparing-against-free.rs:21:15
   3    |
   4 LL |     foo(cell, |cell_a, cell_x| {
   5    |               ^^^^^^^^^^^^^^^^
   6    |
   7    = note: defining type: case1::{closure#0} with closure substs [
   8                i32,
   9                for<Region(BrAnon(0, None))> extern "rust-call" fn((std::cell::Cell<&'_#1r u32>, std::cell::Cell<&ReLateBound(DebruijnIndex(0), BoundRegion { var: 0, kind: BrAnon(0, None) }) u32>)),
  10                (),
  11            ]
  12
  13 error[E0521]: borrowed data escapes outside of closure
  14   --> $DIR/propagate-approximated-shorter-to-static-comparing-against-free.rs:22:9
  15    |
  16 LL |     foo(cell, |cell_a, cell_x| {
  17    |                ------  ------ `cell_x` is a reference that is only valid in the closure body
  18    |                |
  19    |                `cell_a` declared here, outside of the closure body
  20 LL |         cell_a.set(cell_x.get()); // forces 'x: 'a, error in closure
  21    |         ^^^^^^^^^^^^^^^^^^^^^^^^ `cell_x` escapes the closure body here
  22
  23 note: no external requirements
  24   --> $DIR/propagate-approximated-shorter-to-static-comparing-against-free.rs:18:1
  25    |
  26 LL | fn case1() {
  27    | ^^^^^^^^^^
  28    |
  29    = note: defining type: case1
  30
  31 note: external requirements
  32   --> $DIR/propagate-approximated-shorter-to-static-comparing-against-free.rs:35:15
  33    |
  34 LL |     foo(cell, |cell_a, cell_x| {
  35    |               ^^^^^^^^^^^^^^^^
  36    |
  37    = note: defining type: case2::{closure#0} with closure substs [
  38                i32,
  39                for<Region(BrAnon(0, None))> extern "rust-call" fn((std::cell::Cell<&'_#1r u32>, std::cell::Cell<&ReLateBound(DebruijnIndex(0), BoundRegion { var: 0, kind: BrAnon(0, None) }) u32>)),
  40                (),
  41            ]
  42    = note: number of external vids: 2
  43    = note: where '_#1r: '_#0r
  44
  45 note: no external requirements
  46   --> $DIR/propagate-approximated-shorter-to-static-comparing-against-free.rs:28:1
  47    |
  48 LL | fn case2() {
  49    | ^^^^^^^^^^
  50    |
  51    = note: defining type: case2
  52
  53 error[E0597]: `a` does not live long enough
  54   --> $DIR/propagate-approximated-shorter-to-static-comparing-against-free.rs:30:26
  55    |
  56 LL |       let cell = Cell::new(&a);
  57    |                            ^^ borrowed value does not live long enough
  58 ...
  59 LL | /     foo(cell, |cell_a, cell_x| {
  60 LL | |         cell_x.set(cell_a.get()); // forces 'a: 'x, implies 'a = 'static -> borrow error
  61 LL | |     })
  62    | |______- argument requires that `a` is borrowed for `'static`
  63 LL |   }
  64    |   - `a` dropped here while still borrowed
  65
  66 error: aborting due to 2 previous errors
  67
  68 Some errors have detailed explanations: E0521, E0597.
  69 For more information about an error, try `rustc --explain E0521`.