1 files changed, 6 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-20939.rs b/tests/ui/issues/issue-20939.rs
new file mode 100644
index 000000000..c0c222978
--- /dev/null
+++ b/tests/ui/issues/issue-20939.rs
@@ -0,0 +1,6 @@
+trait Foo {}
+
+impl<'a> Foo for dyn Foo + 'a {}
+//~^ ERROR the object type `(dyn Foo + 'a)` automatically implements the trait `Foo`
+
+fn main() {}