1 files changed, 22 insertions, 0 deletions
diff --git a/src/test/ui/regions/regions-debruijn-of-object.rs b/src/test/ui/regions/regions-debruijn-of-object.rs
new file mode 100644
index 000000000..0b5510489
--- /dev/null
+++ b/src/test/ui/regions/regions-debruijn-of-object.rs
@@ -0,0 +1,22 @@
+// run-pass
+#![allow(dead_code)]
+#![allow(unused_variables)]
+#![allow(non_camel_case_types)]
+
+// pretty-expanded FIXME #23616
+
+struct ctxt<'tcx> {
+    x: &'tcx i32
+}
+
+trait AstConv<'tcx> {
+    fn tcx<'a>(&'a self) -> &'a ctxt<'tcx>;
+}
+
+fn foo(conv: &dyn AstConv) { }
+
+fn bar<'tcx>(conv: &dyn AstConv<'tcx>) {
+    foo(conv)
+}
+
+fn main() { }