1 files changed, 34 insertions, 0 deletions
diff --git a/src/test/ui/generic-associated-types/issue-80433.rs b/src/test/ui/generic-associated-types/issue-80433.rs
new file mode 100644
index 000000000..6a1fe7519
--- /dev/null
+++ b/src/test/ui/generic-associated-types/issue-80433.rs
@@ -0,0 +1,34 @@
+#![feature(generic_associated_types)]
+
+#[derive(Default)]
+struct E<T> {
+    data: T,
+}
+
+trait TestMut {
+    type Output<'a>;
+    fn test_mut<'a>(&'a mut self) -> Self::Output<'a>;
+}
+
+impl<T> TestMut for E<T>
+where
+    T: 'static,
+{
+    type Output<'a> = &'a mut T;
+    fn test_mut<'a>(&'a mut self) -> Self::Output<'a> {
+        &mut self.data
+    }
+}
+
+fn test_simpler<'a>(dst: &'a mut impl TestMut<Output = &'a mut f32>)
+  //~^ ERROR missing generics for associated type
+{
+    for n in 0i16..100 {
+        *dst.test_mut() = n.into();
+    }
+}
+
+fn main() {
+    let mut t1: E<f32> = Default::default();
+    test_simpler(&mut t1);
+}