Just disable the JIT for now. Even with the added GCC options it still causes crashes.

==5055== Invalid write of size 8
==5055==    at 0x1B7538F: ???
==5055==    by 0xD5C0D8: operationOptimize
==5055==    by 0x396112C8: ???
...
==5055==  Address 0x7feffe938 is just below the stack ptr.