1 files changed, 49 insertions, 0 deletions
diff --git a/tests/ui/nll/closure-requirements/propagate-approximated-shorter-to-static-wrong-bound.stderr b/tests/ui/nll/closure-requirements/propagate-approximated-shorter-to-static-wrong-bound.stderr
new file mode 100644
index 000000000..96c734226
--- /dev/null
+++ b/tests/ui/nll/closure-requirements/propagate-approximated-shorter-to-static-wrong-bound.stderr
@@ -0,0 +1,49 @@
+note: external requirements
+  --> $DIR/propagate-approximated-shorter-to-static-wrong-bound.rs:35:47
+   |
+LL |     establish_relationships(&cell_a, &cell_b, |_outlives1, _outlives2, x, y| {
+   |                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = note: defining type: supply::{closure#0} with closure substs [
+               i16,
+               for<Region(BrAnon(0, None)), Region(BrAnon(1, None)), Region(BrAnon(2, None)), Region(BrAnon(3, None)), Region(BrAnon(4, None)), Region(BrAnon(5, None))> extern "rust-call" fn((&ReLateBound(DebruijnIndex(0), BoundRegion { var: 0, kind: BrAnon(0, None) }) std::cell::Cell<&'_#1r &ReLateBound(DebruijnIndex(0), BoundRegion { var: 1, kind: BrAnon(1, None) }) u32>, &ReLateBound(DebruijnIndex(0), BoundRegion { var: 2, kind: BrAnon(2, None) }) std::cell::Cell<&'_#2r &ReLateBound(DebruijnIndex(0), BoundRegion { var: 3, kind: BrAnon(3, None) }) u32>, &ReLateBound(DebruijnIndex(0), BoundRegion { var: 4, kind: BrAnon(4, None) }) std::cell::Cell<&ReLateBound(DebruijnIndex(0), BoundRegion { var: 1, kind: BrAnon(1, None) }) u32>, &ReLateBound(DebruijnIndex(0), BoundRegion { var: 5, kind: BrAnon(5, None) }) std::cell::Cell<&ReLateBound(DebruijnIndex(0), BoundRegion { var: 3, kind: BrAnon(3, None) }) u32>)),
+               (),
+           ]
+   = note: late-bound region is '_#3r
+   = note: late-bound region is '_#4r
+   = note: number of external vids: 5
+   = note: where '_#1r: '_#0r
+
+note: no external requirements
+  --> $DIR/propagate-approximated-shorter-to-static-wrong-bound.rs:34:1
+   |
+LL | fn supply<'a, 'b>(cell_a: Cell<&'a u32>, cell_b: Cell<&'b u32>) {
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = note: defining type: supply
+
+error[E0521]: borrowed data escapes outside of function
+  --> $DIR/propagate-approximated-shorter-to-static-wrong-bound.rs:35:5
+   |
+LL |   fn supply<'a, 'b>(cell_a: Cell<&'a u32>, cell_b: Cell<&'b u32>) {
+   |             --      ------ `cell_a` is a reference that is only valid in the function body
+   |             |
+   |             lifetime `'a` defined here
+LL | /     establish_relationships(&cell_a, &cell_b, |_outlives1, _outlives2, x, y| {
+LL | |
+LL | |
+LL | |         // Only works if 'x: 'y:
+LL | |         demand_y(x, y, x.get())
+LL | |     });
+   | |      ^
+   | |      |
+   | |______`cell_a` escapes the function body here
+   |        argument requires that `'a` must outlive `'static`
+   |
+   = note: requirement occurs because of the type `Cell<&'_#10r u32>`, which makes the generic argument `&'_#10r u32` invariant
+   = note: the struct `Cell<T>` is invariant over the parameter `T`
+   = help: see <https://doc.rust-lang.org/nomicon/subtyping.html> for more information about variance
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0521`.