[dynamo 3.11] small bug fixes (#96508)
Bugs fixed:
- CALL_FUNCTION_EX expects null pop in symbolic_convert
- make_function_with_closure codegen requires a push_null
- copy over the closure in eval_frame.c
- add JUMP_FORWARD to terminal opcodes
- enum repr fix in utils.py
- fix symbolic_convert's break_graph_if_unsupported wrapper
Pull Request resolved: https://github.com/pytorch/pytorch/pull/96508
Approved by: https://github.com/jansel
