1 files changed, 19 insertions, 0 deletions
diff --git a/tests/ui/generic-associated-types/trait-objects.rs b/tests/ui/generic-associated-types/trait-objects.rs
new file mode 100644
index 000000000..17fed11ba
--- /dev/null
+++ b/tests/ui/generic-associated-types/trait-objects.rs
@@ -0,0 +1,19 @@
+// revisions: base extended
+
+#![cfg_attr(extended, feature(generic_associated_types_extended))]
+#![cfg_attr(extended, allow(incomplete_features))]
+
+trait StreamingIterator {
+    type Item<'a> where Self: 'a;
+    fn size_hint(&self) -> (usize, Option<usize>);
+    // Uncommenting makes `StreamingIterator` not object safe
+//    fn next(&mut self) -> Self::Item<'_>;
+}
+
+fn min_size(x: &mut dyn for<'a> StreamingIterator<Item<'a> = &'a i32>) -> usize {
+    //[base]~^ the trait `StreamingIterator` cannot be made into an object
+    x.size_hint().0
+    //[extended]~^ borrowed data escapes
+}
+
+fn main() {}