diff -r e3974e7360e9 -r 23189d937087 src/Opcodes.cpp
--- a/src/Opcodes.cpp	Wed Jul 25 01:30:33 2012 -0700
+++ b/src/Opcodes.cpp	Wed Jul 25 01:32:49 2012 -0700
@@ -75,10 +75,12 @@
     // Only specific opcodes may have safepoints. Asking for a safepoint at
     // any other position indicates a failure to mark that position as a
     // safepoint, which is a bug.
+#ifndef NDEBUG
     Opcode op = Opcode(*(start() + pcOffset));
     assert(op == OP_CALL || op == OP_NEWARRAY || op == OP_VARREF_LIFO ||
            op == OP_ARGREF_LIFO || op == OP_SLOTREF_LIFO || op == OP_ARRAYREF_LIFO ||
            op == OP_ARRAYCOPY);
+#endif
 
     if (!safepoints_)
         return NULL;