diff -r d2516d66101a -r a000bafece09 src/Interpreter.cpp
--- a/src/Interpreter.cpp	Mon Jul 30 12:13:08 2012 -0700
+++ b/src/Interpreter.cpp	Mon Jul 30 12:13:22 2012 -0700
@@ -918,6 +918,14 @@
     break;
 }
 
+case OP_BITS_I2F:
+case OP_BITS_F2I:
+{
+    // Because the stack is a union, these are actually no-ops in the
+    // interpreter.
+    break;
+}
+
 default:
     assert(false);
     return false;