--- a/src/hotspot/share/gc/z/zArguments.cpp	Wed Jun 20 11:33:42 2018 +0200
+++ b/src/hotspot/share/gc/z/zArguments.cpp	Wed Jun 20 11:33:43 2018 +0200
@@ -91,6 +91,10 @@
   FLAG_SET_DEFAULT(VerifyDuringStartup, false);
   FLAG_SET_DEFAULT(VerifyBeforeExit, false);
 
+  // Verification before heap iteration not (yet) supported, for the
+  // same reason we need fixup_partial_loads
+  FLAG_SET_DEFAULT(VerifyBeforeIteration, false);
+
   // Verification of stacks not (yet) supported, for the same reason
   // we need fixup_partial_loads
   DEBUG_ONLY(FLAG_SET_DEFAULT(VerifyStack, false));