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<'r> extern "rust-call" fn((std::cell::Cell<&'_#1r u32>, std::cell::Cell<&ReLateBound(DebruijnIndex(0), BoundRegion { var: 0, kind: BrNamed('r) }) 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 LL | |     let a = 0;
  28 LL | |     let cell = Cell::new(&a);
  29 LL | |     foo(cell, |cell_a, cell_x| {
  30 ...  |
  31 LL | |     })
  32 LL | | }
  33    | |_^
  34    |
  35    = note: defining type: case1
  36
  37 note: external requirements
  38   --> $DIR/propagate-approximated-shorter-to-static-comparing-against-free.rs:35:15
  39    |
  40 LL |     foo(cell, |cell_a, cell_x| {
  41    |               ^^^^^^^^^^^^^^^^
  42    |
  43    = note: defining type: case2::{closure#0} with closure substs [
  44                i32,
  45                for<'r> extern "rust-call" fn((std::cell::Cell<&'_#1r u32>, std::cell::Cell<&ReLateBound(DebruijnIndex(0), BoundRegion { var: 0, kind: BrNamed('r) }) u32>)),
  46                (),
  47            ]
  48    = note: number of external vids: 2
  49    = note: where '_#1r: '_#0r
  50
  51 note: no external requirements
  52   --> $DIR/propagate-approximated-shorter-to-static-comparing-against-free.rs:28:1
  53    |
  54 LL | / fn case2() {
  55 LL | |     let a = 0;
  56 LL | |     let cell = Cell::new(&a);
  57 LL | |
  58 ...  |
  59 LL | |     })
  60 LL | | }
  61    | |_^
  62    |
  63    = note: defining type: case2
  64
  65 error[E0597]: `a` does not live long enough
  66   --> $DIR/propagate-approximated-shorter-to-static-comparing-against-free.rs:30:26
  67    |
  68 LL |       let cell = Cell::new(&a);
  69    |                            ^^ borrowed value does not live long enough
  70 ...
  71 LL | /     foo(cell, |cell_a, cell_x| {
  72 LL | |         cell_x.set(cell_a.get()); // forces 'a: 'x, implies 'a = 'static -> borrow error
  73 LL | |     })
  74    | |______- argument requires that `a` is borrowed for `'static`
  75 LL |   }
  76    |   - `a` dropped here while still borrowed
  77
  78 error: aborting due to 2 previous errors
  79
  80 Some errors have detailed explanations: E0521, E0597.
  81 For more information about an error, try `rustc --explain E0521`.