--- old/src/share/vm/gc_implementation/g1/g1CollectorPolicy.cpp	2013-09-24 10:53:06.000000000 +0200
+++ new/src/share/vm/gc_implementation/g1/g1CollectorPolicy.cpp	2013-09-24 10:53:06.000000000 +0200
@@ -344,6 +344,10 @@
     }
   }
 
+  if (FLAG_IS_CMDLINE(NewSize) && FLAG_IS_CMDLINE(MaxNewSize) && NewSize > MaxNewSize) {
+    vm_exit_during_initialization("Incompatible initial and maximum young gen sizes specified");
+  }
+
   if (FLAG_IS_CMDLINE(NewSize)) {
     _min_desired_young_length = MAX2((uint) (NewSize / HeapRegion::GrainBytes),
                                      1U);