1 files changed, 16 insertions, 0 deletions

diff --git a/src/test/ui/issues/issue-3991.rs b/src/test/ui/issues/issue-3991.rs
new file mode 100644
index 000000000..4851eddf5
--- /dev/null
+++ b/src/test/ui/issues/issue-3991.rs
@@ -0,0 +1,16 @@
+// check-pass
+#![allow(dead_code)]
+
+// pretty-expanded FIXME #23616
+
+struct HasNested {
+    nest: Vec<Vec<isize> > ,
+}
+
+impl HasNested {
+    fn method_push_local(&mut self) {
+        self.nest[0].push(0);
+    }
+}
+
+pub fn main() {}