[CHANGES]
- Always generate the slots AV even with no slots because otherwise
METHSTART gets upset about no-slot subclasses
- Capture the
async method
unit tests from Future-AsyncAwait
[BUGFIXES]
- Ensure that object refs or slot values don't hang around in method
lexicals after they've returned (RT132228)
- Use OP_STUB to ensure no-slot subclasses don't crash OP_PUSH on
perls 5.18 to 5.22 (thanks ilmari)