1 files changed, 18 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-37051.rs b/tests/ui/issues/issue-37051.rs
new file mode 100644
index 00000000000..9cae6cf5e76
--- /dev/null
+++ b/tests/ui/issues/issue-37051.rs
@@ -0,0 +1,18 @@
+// check-pass
+
+#![feature(associated_type_defaults)]
+
+trait State: Sized {
+    type NextState: State = StateMachineEnded;
+    fn execute(self) -> Option<Self::NextState>;
+}
+
+struct StateMachineEnded;
+
+impl State for StateMachineEnded {
+    fn execute(self) -> Option<Self::NextState> {
+        None
+    }
+}
+
+fn main() {}