--- old/src/share/vm/gc/g1/g1ConcurrentMark.cpp	2016-04-06 17:17:19.750383612 +0200
+++ new/src/share/vm/gc/g1/g1ConcurrentMark.cpp	2016-04-06 17:17:19.614383610 +0200
@@ -1923,7 +1923,7 @@
     } else {
       assert(_finger > finger, "the finger should have moved forward");
       // read it again
-      finger = _finger;
+      finger = res;
     }
   }