Index: src/tests/memberCtors.c
===================================================================
--- src/tests/memberCtors.c	(revision ebb5ed97e24d201a4b63b9fcebd313093b1bf3bc)
+++ src/tests/memberCtors.c	(revision 235114f58dbd5442fe755928fdeb3dd01f263d9f)
@@ -30,4 +30,8 @@
   WrappedInt x, y, z;
 };
+
+void ?{}(A * a) {
+  // currently must define default ctor, since there's no "= default" syntax
+}
 
 void ?{}(A * a, int x) {