1 files changed, 23 insertions, 0 deletions
diff --git a/tests/ui/nll/closure-requirements/return-wrong-bound-region.rs b/tests/ui/nll/closure-requirements/return-wrong-bound-region.rs
new file mode 100644
index 000000000..e34a3f6f2
--- /dev/null
+++ b/tests/ui/nll/closure-requirements/return-wrong-bound-region.rs
@@ -0,0 +1,23 @@
+// Test closure that takes two references and is supposed to return
+// the first, but actually returns the second. This should fail within
+// the closure.
+
+// compile-flags:-Zverbose
+
+#![feature(rustc_attrs)]
+
+#[rustc_regions]
+fn test() {
+    expect_sig(|a, b| b); // ought to return `a`
+    //~^ ERROR
+}
+
+fn expect_sig<F>(f: F) -> F
+    where F: for<'a> FnMut(&'a i32, &i32) -> &'a i32
+{
+    f
+}
+
+fn deref(_p: &i32) { }
+
+fn main() { }