--- a/hotspot/src/share/vm/gc_implementation/g1/concurrentMark.cpp	Fri Mar 13 18:39:22 2009 -0700
+++ b/hotspot/src/share/vm/gc_implementation/g1/concurrentMark.cpp	Mon Mar 16 15:06:33 2009 -0700
@@ -107,7 +107,7 @@
 #ifndef PRODUCT
 bool CMBitMapRO::covers(ReservedSpace rs) const {
   // assert(_bm.map() == _virtual_space.low(), "map inconsistency");
-  assert(((size_t)_bm.size() * (1 << _shifter)) == _bmWordSize,
+  assert(((size_t)_bm.size() * (size_t)(1 << _shifter)) == _bmWordSize,
          "size inconsistency");
   return _bmStartWord == (HeapWord*)(rs.base()) &&
          _bmWordSize  == rs.size()>>LogHeapWordSize;