Merging upstream version 1.68.2+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 30 insertions, 0 deletions

diff --git a/tests/ui/object-lifetime/object-lifetime-default-dyn-binding-nonstatic2.rs b/tests/ui/object-lifetime/object-lifetime-default-dyn-binding-nonstatic2.rs
new file mode 100644
index 000000000..2a7415174
--- /dev/null
+++ b/tests/ui/object-lifetime/object-lifetime-default-dyn-binding-nonstatic2.rs
@@ -0,0 +1,30 @@
+// Test that `dyn Bar<Item = XX>` uses `'static` as the default object
+// lifetime bound for the type `XX`.
+
+trait Foo<'a> {
+    type Item: 'a + ?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 default to `dyn Bar + 'a`.  Or, we *should*, 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);
+
+    // If it weren't for the conservative path above, we'd expect an
+    // error here.
+    is_static(r.item());
+}