1 files changed, 22 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-50825-1.rs b/tests/ui/issues/issue-50825-1.rs
new file mode 100644
index 000000000..ee4316029
--- /dev/null
+++ b/tests/ui/issues/issue-50825-1.rs
@@ -0,0 +1,22 @@
+// run-pass
+// regression test for issue #50825
+// Make sure that the `impl` bound (): X<T = ()> is preferred over
+// the (): X bound in the where clause.
+
+trait X {
+    type T;
+}
+
+trait Y<U>: X {
+    fn foo(x: &Self::T);
+}
+
+impl X for () {
+    type T = ();
+}
+
+impl<T> Y<Vec<T>> for () where (): Y<T> {
+    fn foo(_x: &()) {}
+}
+
+fn main () {}