1 files changed, 58 insertions, 0 deletions
diff --git a/tests/ui/object-lifetime/object-lifetime-default-from-ref-struct.rs b/tests/ui/object-lifetime/object-lifetime-default-from-ref-struct.rs
new file mode 100644
index 000000000..e1a865fa5
--- /dev/null
+++ b/tests/ui/object-lifetime/object-lifetime-default-from-ref-struct.rs
@@ -0,0 +1,58 @@
+// 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 Ref<'a,T:'a+?Sized> {
+    r: &'a T
+}
+
+struct Ref2<'a,'b,T:'a+'b+?Sized> {
+    a: &'a T,
+    b: &'b T
+}
+
+struct SomeStruct<'a> {
+    t: Ref<'a, dyn Test>,
+    u: Ref<'a, dyn Test+'a>,
+}
+
+fn a<'a>(t: Ref<'a, dyn Test>, mut ss: SomeStruct<'a>) {
+    ss.t = t;
+}
+
+fn b<'a>(t: Ref<'a, dyn Test>, mut ss: SomeStruct<'a>) {
+    ss.u = t;
+}
+
+fn c<'a>(t: Ref<'a, dyn Test+'a>, mut ss: SomeStruct<'a>) {
+    ss.t = t;
+}
+
+fn d<'a>(t: Ref<'a, dyn Test+'a>, mut ss: SomeStruct<'a>) {
+    ss.u = t;
+}
+
+fn e<'a>(_: Ref<'a, dyn Display+'static>) {}
+fn g<'a, 'b>(_: Ref2<'a, 'b, dyn Display+'static>) {}
+
+
+fn main() {
+    // Inside a function body, we can just infer all
+    // lifetimes, to allow Ref<'tmp, Display+'static>
+    // and Ref2<'tmp, 'tmp, Display+'static>.
+    let x = &0 as &(dyn Display+'static);
+    let r: Ref<dyn Display> = Ref { r: x };
+    let r2: Ref2<dyn Display> = Ref2 { a: x, b: x };
+    e(r);
+    g(r2);
+}