--- old/src/share/vm/gc/shared/referenceProcessor.cpp	2015-10-14 13:54:04.665120483 +0200
+++ new/src/share/vm/gc/shared/referenceProcessor.cpp	2015-10-14 13:54:03.679144325 +0200
@@ -1094,7 +1094,7 @@
       // Check assumption that an object is not potentially
       // discovered twice except by concurrent collectors that potentially
       // trace the same Reference object twice.
-      assert(UseConcMarkSweepGC || UseG1GC,
+      assert(UseConcMarkSweepGC || UseG1GC || UseShenandoahGC,
              "Only possible with a concurrent marking collector");
       return true;
     }
@@ -1293,4 +1293,3 @@
    ShouldNotReachHere();
    return NULL;
 }
-