1 files changed, 42 insertions, 0 deletions
diff --git a/tests/ui/object-lifetime/object-lifetime-default-from-rptr.rs b/tests/ui/object-lifetime/object-lifetime-default-from-rptr.rs
new file mode 100644
index 00000000000..5093b1c27d0
--- /dev/null
+++ b/tests/ui/object-lifetime/object-lifetime-default-from-rptr.rs
@@ -0,0 +1,42 @@
+// run-pass
+// Test that the lifetime of the enclosing `&` is used for the object
+// lifetime bound.
+
+// pretty-expanded FIXME #23616
+
+#![allow(dead_code)]
+
+use std::fmt::Display;
+
+trait Test {
+    fn foo(&self) { }
+}
+
+struct SomeStruct<'a> {
+    t: &'a dyn Test,
+    u: &'a (dyn Test+'a),
+}
+
+fn a<'a>(t: &'a dyn Test, mut ss: SomeStruct<'a>) {
+    ss.t = t;
+}
+
+fn b<'a>(t: &'a dyn Test, mut ss: SomeStruct<'a>) {
+    ss.u = t;
+}
+
+fn c<'a>(t: &'a (dyn Test+'a), mut ss: SomeStruct<'a>) {
+    ss.t = t;
+}
+
+fn d<'a>(t: &'a (dyn Test+'a), mut ss: SomeStruct<'a>) {
+    ss.u = t;
+}
+
+fn e<'a>(_: &'a (dyn Display+'static)) {}
+
+fn main() {
+    // Inside a function body, we can just infer both
+    // lifetimes, to allow &'tmp (Display+'static).
+    e(&0 as &dyn Display);
+}