1 files changed, 21 insertions, 0 deletions
diff --git a/src/test/ui/impl-trait/region-escape-via-bound.rs b/src/test/ui/impl-trait/region-escape-via-bound.rs
new file mode 100644
index 000000000..fe60c76ca
--- /dev/null
+++ b/src/test/ui/impl-trait/region-escape-via-bound.rs
@@ -0,0 +1,21 @@
+// Test that we do not allow the region `'x` to escape in the impl
+// trait **even though** `'y` escapes, which outlives `'x`.
+//
+// See https://github.com/rust-lang/rust/issues/46541 for more details.
+
+#![allow(dead_code)]
+
+use std::cell::Cell;
+
+trait Trait<'a> { }
+
+impl<'a, 'b> Trait<'b> for Cell<&'a u32> { }
+
+fn foo<'x, 'y>(x: Cell<&'x u32>) -> impl Trait<'y>
+where 'x: 'y
+{
+    x
+    //~^ ERROR hidden type for `impl Trait<'y>` captures lifetime that does not appear in bounds [E0700]
+}
+
+fn main() { }