1 files changed, 69 insertions, 0 deletions
diff --git a/tests/ui/nll/closure-requirements/propagate-approximated-shorter-to-static-comparing-against-free.stderr b/tests/ui/nll/closure-requirements/propagate-approximated-shorter-to-static-comparing-against-free.stderr
new file mode 100644
index 000000000..7991abeb7
--- /dev/null
+++ b/tests/ui/nll/closure-requirements/propagate-approximated-shorter-to-static-comparing-against-free.stderr
@@ -0,0 +1,69 @@
+note: no external requirements
+  --> $DIR/propagate-approximated-shorter-to-static-comparing-against-free.rs:21:15
+   |
+LL |     foo(cell, |cell_a, cell_x| {
+   |               ^^^^^^^^^^^^^^^^
+   |
+   = note: defining type: case1::{closure#0} with closure substs [
+               i32,
+               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>)),
+               (),
+           ]
+
+error[E0521]: borrowed data escapes outside of closure
+  --> $DIR/propagate-approximated-shorter-to-static-comparing-against-free.rs:22:9
+   |
+LL |     foo(cell, |cell_a, cell_x| {
+   |                ------  ------ `cell_x` is a reference that is only valid in the closure body
+   |                |
+   |                `cell_a` declared here, outside of the closure body
+LL |         cell_a.set(cell_x.get()); // forces 'x: 'a, error in closure
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^ `cell_x` escapes the closure body here
+
+note: no external requirements
+  --> $DIR/propagate-approximated-shorter-to-static-comparing-against-free.rs:18:1
+   |
+LL | fn case1() {
+   | ^^^^^^^^^^
+   |
+   = note: defining type: case1
+
+note: external requirements
+  --> $DIR/propagate-approximated-shorter-to-static-comparing-against-free.rs:35:15
+   |
+LL |     foo(cell, |cell_a, cell_x| {
+   |               ^^^^^^^^^^^^^^^^
+   |
+   = note: defining type: case2::{closure#0} with closure substs [
+               i32,
+               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>)),
+               (),
+           ]
+   = note: number of external vids: 2
+   = note: where '_#1r: '_#0r
+
+note: no external requirements
+  --> $DIR/propagate-approximated-shorter-to-static-comparing-against-free.rs:28:1
+   |
+LL | fn case2() {
+   | ^^^^^^^^^^
+   |
+   = note: defining type: case2
+
+error[E0597]: `a` does not live long enough
+  --> $DIR/propagate-approximated-shorter-to-static-comparing-against-free.rs:30:26
+   |
+LL |       let cell = Cell::new(&a);
+   |                            ^^ borrowed value does not live long enough
+...
+LL | /     foo(cell, |cell_a, cell_x| {
+LL | |         cell_x.set(cell_a.get()); // forces 'a: 'x, implies 'a = 'static -> borrow error
+LL | |     })
+   | |______- argument requires that `a` is borrowed for `'static`
+LL |   }
+   |   - `a` dropped here while still borrowed
+
+error: aborting due to 2 previous errors
+
+Some errors have detailed explanations: E0521, E0597.
+For more information about an error, try `rustc --explain E0521`.