diff -r bea7a22a6f79 -r 4e6abf09f540 src/share/vm/memory/genCollectedHeap.cpp
--- a/src/share/vm/memory/genCollectedHeap.cpp	Fri Jan 08 09:42:31 2010 -0800
+++ b/src/share/vm/memory/genCollectedHeap.cpp	Fri Jan 08 13:47:01 2010 -0800
@@ -925,6 +925,8 @@
   guarantee(VerifyBeforeGC   ||
             VerifyDuringGC   ||
             VerifyBeforeExit ||
+            PrintAssembly    ||
+            tty->count() != 0 ||   // already printing
             VerifyAfterGC, "too expensive");
   #endif
   // This might be sped up with a cache of the last generation that