1 files changed, 54 insertions, 0 deletions
diff --git a/tests/ui/borrowck/struct-with-reference-to-trait-5708.rs b/tests/ui/borrowck/struct-with-reference-to-trait-5708.rs
new file mode 100644
index 00000000000..5157a3bf36b
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+++ b/tests/ui/borrowck/struct-with-reference-to-trait-5708.rs
@@ -0,0 +1,54 @@
+// https://github.com/rust-lang/rust/issues/5708
+//@ run-pass
+#![allow(unused_variables)]
+/*
+# ICE when returning struct with reference to trait
+
+A function which takes a reference to a trait and returns a
+struct with that reference results in an ICE.
+
+This does not occur with concrete types, only with references
+to traits.
+*/
+
+// original
+trait Inner {
+    fn print(&self);
+}
+
+impl Inner for isize {
+    fn print(&self) { print!("Inner: {}\n", *self); }
+}
+
+struct Outer<'a> {
+    inner: &'a (dyn Inner+'a)
+}
+
+impl<'a> Outer<'a> {
+    fn new(inner: &dyn Inner) -> Outer<'_> {
+        Outer {
+            inner: inner
+        }
+    }
+}
+
+pub fn main() {
+    let inner: isize = 5;
+    let outer = Outer::new(&inner as &dyn Inner);
+    outer.inner.print();
+}
+
+// minimal
+pub trait MyTrait<T> {
+    fn dummy(&self, t: T) -> T { panic!() }
+}
+
+pub struct MyContainer<'a, T:'a> {
+    foos: Vec<&'a (dyn MyTrait<T>+'a)> ,
+}
+
+impl<'a, T> MyContainer<'a, T> {
+    pub fn add (&mut self, foo: &'a dyn MyTrait<T>) {
+        self.foos.push(foo);
+    }
+}