1 files changed, 45 insertions, 0 deletions
diff --git a/src/test/ui/nll/closure-requirements/propagate-approximated-val.stderr b/src/test/ui/nll/closure-requirements/propagate-approximated-val.stderr
new file mode 100644
index 000000000..a570932ed
--- /dev/null
+++ b/src/test/ui/nll/closure-requirements/propagate-approximated-val.stderr
@@ -0,0 +1,45 @@
+note: external requirements
+  --> $DIR/propagate-approximated-val.rs:36:45
+   |
+LL |     establish_relationships(cell_a, cell_b, |outlives1, outlives2, x, y| {
+   |                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = note: defining type: test::{closure#0} with closure substs [
+               i16,
+               for<'r, 's> extern "rust-call" fn((std::cell::Cell<&'_#1r &ReLateBound(DebruijnIndex(0), BoundRegion { var: 0, kind: BrNamed('r) }) u32>, std::cell::Cell<&ReLateBound(DebruijnIndex(0), BoundRegion { var: 1, kind: BrNamed('s) }) &'_#2r u32>, std::cell::Cell<&ReLateBound(DebruijnIndex(0), BoundRegion { var: 0, kind: BrNamed('r) }) u32>, std::cell::Cell<&ReLateBound(DebruijnIndex(0), BoundRegion { var: 1, kind: BrNamed('s) }) u32>)),
+               (),
+           ]
+   = note: late-bound region is '_#3r
+   = note: late-bound region is '_#4r
+   = note: number of external vids: 5
+   = note: where '_#1r: '_#2r
+
+note: no external requirements
+  --> $DIR/propagate-approximated-val.rs:35:1
+   |
+LL | / fn test<'a, 'b>(cell_a: Cell<&'a u32>, cell_b: Cell<&'b u32>) {
+LL | |     establish_relationships(cell_a, cell_b, |outlives1, outlives2, x, y| {
+LL | |         // Only works if 'x: 'y:
+LL | |         demand_y(outlives1, outlives2, x.get())
+LL | |
+LL | |     });
+LL | | }
+   | |_^
+   |
+   = note: defining type: test
+
+error: lifetime may not live long enough
+  --> $DIR/propagate-approximated-val.rs:38:9
+   |
+LL | fn test<'a, 'b>(cell_a: Cell<&'a u32>, cell_b: Cell<&'b u32>) {
+   |         --  -- lifetime `'b` defined here
+   |         |
+   |         lifetime `'a` defined here
+...
+LL |         demand_y(outlives1, outlives2, x.get())
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ argument requires that `'a` must outlive `'b`
+   |
+   = help: consider adding the following bound: `'a: 'b`
+
+error: aborting due to previous error
+