1 files changed, 31 insertions, 0 deletions
diff --git a/tests/ui/nll/closure-requirements/return-wrong-bound-region.stderr b/tests/ui/nll/closure-requirements/return-wrong-bound-region.stderr
new file mode 100644
index 000000000..6db72b886
--- /dev/null
+++ b/tests/ui/nll/closure-requirements/return-wrong-bound-region.stderr
@@ -0,0 +1,31 @@
+note: no external requirements
+  --> $DIR/return-wrong-bound-region.rs:11:16
+   |
+LL |     expect_sig(|a, b| b); // ought to return `a`
+   |                ^^^^^^
+   |
+   = note: defining type: test::{closure#0} with closure substs [
+               i16,
+               for<Region(BrAnon(0, None)), Region(BrAnon(1, None))> extern "rust-call" fn((&ReLateBound(DebruijnIndex(0), BoundRegion { var: 0, kind: BrAnon(0, None) }) i32, &ReLateBound(DebruijnIndex(0), BoundRegion { var: 1, kind: BrAnon(1, None) }) i32)) -> &ReLateBound(DebruijnIndex(0), BoundRegion { var: 0, kind: BrAnon(0, None) }) i32,
+               (),
+           ]
+
+error: lifetime may not live long enough
+  --> $DIR/return-wrong-bound-region.rs:11:23
+   |
+LL |     expect_sig(|a, b| b); // ought to return `a`
+   |                 -  -  ^ closure was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1`
+   |                 |  |
+   |                 |  has type `&'1 i32`
+   |                 has type `&'2 i32`
+
+note: no external requirements
+  --> $DIR/return-wrong-bound-region.rs:10:1
+   |
+LL | fn test() {
+   | ^^^^^^^^^
+   |
+   = note: defining type: test
+
+error: aborting due to previous error
+