Index: test_generic_locks.cpp
===================================================================
--- test_generic_locks.cpp	(revision 62599)
+++ test_generic_locks.cpp	(working copy)
@@ -303,6 +303,9 @@
 private:
     dummy_mutex* p;
 public:
+    dummy_iterator():
+        p(0)
+    {}
     explicit dummy_iterator(dummy_mutex* p_):
         p(p_)
     {}