--- old/src/hotspot/share/gc/g1/g1Arguments.cpp	2017-11-29 12:36:29.272645044 +0100
+++ new/src/hotspot/share/gc/g1/g1Arguments.cpp	2017-11-29 12:36:29.052636303 +0100
@@ -95,8 +95,10 @@
   log_trace(gc)("MarkStackSize: %uk  MarkStackSizeMax: %uk", (unsigned int) (MarkStackSize / K), (uint) (MarkStackSizeMax / K));
 }
 
-void G1Arguments::parse_verification_type(const char* type) {
+bool G1Arguments::parse_verification_type(const char* type) {
   G1CollectedHeap::heap()->verifier()->parse_verification_type(type);
+  // Always return true because we want to parse all values.
+  return true;
 }
 
 CollectedHeap* G1Arguments::create_heap() {