1 files changed, 56 insertions, 0 deletions
diff --git a/tests/ui/lifetimes/lifetime-bound-will-change-warning.rs b/tests/ui/lifetimes/lifetime-bound-will-change-warning.rs
new file mode 100644
index 000000000..0d0303705
--- /dev/null
+++ b/tests/ui/lifetimes/lifetime-bound-will-change-warning.rs
@@ -0,0 +1,56 @@
+// aux-build:lifetime_bound_will_change_warning_lib.rs
+
+// Test that various corner cases cause an error. These are tests
+// that used to pass before we tweaked object defaults.
+
+#![allow(dead_code)]
+#![allow(unused_variables)]
+
+
+extern crate lifetime_bound_will_change_warning_lib as lib;
+
+fn just_ref(x: &dyn Fn()) {
+}
+
+fn ref_obj(x: &Box<dyn Fn()>) {
+    // this will change to &Box<Fn()+'static>...
+
+    // Note: no warning is issued here, because the type of `x` will change to 'static
+    if false { ref_obj(x); }
+}
+
+fn test1<'a>(x: &'a Box<dyn Fn() + 'a>) {
+    // just_ref will stay the same.
+    just_ref(&**x)
+}
+
+fn test1cc<'a>(x: &'a Box<dyn Fn() + 'a>) {
+    // same as test1, but cross-crate
+    lib::just_ref(&**x)
+}
+
+fn test2<'a>(x: &'a Box<dyn Fn() + 'a>) {
+    // but ref_obj will not, so warn.
+    ref_obj(x)
+    //~^ ERROR borrowed data escapes
+}
+
+fn test2cc<'a>(x: &'a Box<dyn Fn() + 'a>) {
+    // same as test2, but cross crate
+    lib::ref_obj(x)
+    //~^ ERROR borrowed data escapes
+}
+
+fn test3<'a>(x: &'a Box<dyn Fn() + 'static>) {
+    // here, we have a 'static bound, so even when ref_obj changes, no error results
+    ref_obj(x)
+}
+
+fn test3cc<'a>(x: &'a Box<dyn Fn() + 'static>) {
+    // same as test3, but cross crate
+    lib::ref_obj(x)
+}
+
+
+fn main() {
+}