1 files changed, 28 insertions, 0 deletions

diff --git a/src/test/ui/issues/issue-3979-2.rs b/src/test/ui/issues/issue-3979-2.rs
new file mode 100644
index 00000000000..adfd5873ea7
--- /dev/null
+++ b/src/test/ui/issues/issue-3979-2.rs
@@ -0,0 +1,28 @@
+// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// compile-pass
+// pretty-expanded FIXME #23616
+
+trait A {
+    fn a_method(&self);
+}
+
+trait B: A {
+    fn b_method(&self);
+}
+
+trait C: B {
+    fn c_method(&self) {
+        self.a_method();
+    }
+}
+
+pub fn main() {}