1 files changed, 34 insertions, 0 deletions
diff --git a/src/test/ui/regions/issue-12470.rs b/src/test/ui/regions/issue-12470.rs
new file mode 100644
index 000000000..d8f2abb0c
--- /dev/null
+++ b/src/test/ui/regions/issue-12470.rs
@@ -0,0 +1,34 @@
+trait X {
+    fn get_i(&self) -> isize;
+}
+
+
+
+
+struct B {
+    i: isize
+}
+
+impl X for B {
+    fn get_i(&self) -> isize {
+        self.i
+    }
+}
+
+struct A<'a> {
+    p: &'a (dyn X + 'a)
+}
+
+fn make_a<'a>(p: &'a dyn X) -> A<'a> {
+    A { p: p }
+}
+
+fn make_make_a<'a>() -> A<'a> {
+    let b: Box<B> = Box::new(B { i: 1 });
+    let bb: &B = &*b;
+    make_a(bb)  //~ ERROR cannot return value referencing local data `*b`
+}
+
+fn main() {
+    let _a = make_make_a();
+}