1 files changed, 27 insertions, 0 deletions
diff --git a/src/test/ui/object-lifetime/object-lifetime-default-dyn-binding-nonstatic1.rs b/src/test/ui/object-lifetime/object-lifetime-default-dyn-binding-nonstatic1.rs
new file mode 100644
index 000000000..7337383e2
--- /dev/null
+++ b/src/test/ui/object-lifetime/object-lifetime-default-dyn-binding-nonstatic1.rs
@@ -0,0 +1,27 @@
+// Test that `dyn Bar<Item = XX>` uses `'static` as the default object
+// lifetime bound for the type `XX`.
+
+trait Foo<'a> {
+    type Item: ?Sized;
+
+    fn item(&self) -> Box<Self::Item> { panic!() }
+}
+
+trait Bar { }
+
+impl<T> Foo<'_> for T {
+    type Item = dyn Bar;
+}
+
+fn is_static<T>(_: T) where T: 'static { }
+
+// Here, we should default to `dyn Bar + 'static`, but the current
+// code forces us into a conservative, hacky path.
+fn bar<'a>(x: &'a str) -> &'a dyn Foo<'a, Item = dyn Bar> { &() }
+//~^ ERROR please supply an explicit bound
+
+fn main() {
+    let s = format!("foo");
+    let r = bar(&s);
+    is_static(r.item());
+}