1 files changed, 22 insertions, 0 deletions
diff --git a/src/test/ui/regions/regions-assoc-type-region-bound.rs b/src/test/ui/regions/regions-assoc-type-region-bound.rs
new file mode 100644
index 000000000..cbb7d1726
--- /dev/null
+++ b/src/test/ui/regions/regions-assoc-type-region-bound.rs
@@ -0,0 +1,22 @@
+// run-pass
+#![allow(dead_code)]
+// Test that the compiler considers the 'a bound declared in the
+// trait. Issue #20890.
+
+// pretty-expanded FIXME #23616
+
+trait Foo<'a> {
+    type Value: 'a;
+
+    fn get(&self) -> &'a Self::Value;
+}
+
+fn takes_foo<'a,F: Foo<'a>>(f: &'a F) {
+    // This call would be illegal, because it results in &'a F::Value,
+    // and the only way we know that `F::Value : 'a` is because of the
+    // trait declaration.
+
+    f.get();
+}
+
+fn main() { }