1 files changed, 18 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 000000000..4ec128a45
--- /dev/null
+++ b/src/test/ui/issues/issue-3979-2.rs
@@ -0,0 +1,18 @@
+// check-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() {}