tests: Move run-pass tests without naming conflicts to ui

src/test/ui/structs-enums/object-lifetime-default-from-rptr-struct.rs

@@ -0,0 +1,37 @@
+// run-pass
+// Test that the lifetime from the enclosing `&` is "inherited"
+// through the `MyBox` struct.
+
+// pretty-expanded FIXME #23616
+
+#![allow(dead_code)]
+
+trait Test {
+    fn foo(&self) { }
+}
+
+struct SomeStruct<'a> {
+    t: &'a MyBox<dyn Test>,
+    u: &'a MyBox<dyn Test+'a>,
+}
+
+struct MyBox<T:?Sized> {
+    b: Box<T>
+}
+
+fn a<'a>(t: &'a MyBox<dyn Test>, mut ss: SomeStruct<'a>) {
+    ss.t = t;
+}
+
+fn b<'a>(t: &'a MyBox<dyn Test>, mut ss: SomeStruct<'a>) {
+    ss.u = t;
+}
+
+// see also compile-fail/object-lifetime-default-from-rptr-box-error.rs
+
+fn d<'a>(t: &'a MyBox<dyn Test+'a>, mut ss: SomeStruct<'a>) {
+    ss.u = t;
+}
+
+fn main() {
+}