JIT: Optimization in _CHECK_FUNCTION_VERSION is wrong #146261
Description
Bug report
Bug description:
A function version may be modified midway in the trace, so we need to recheck and add a watcher in the first check.
(All credits go to @Fidget-Spinner for pointing this out, #145080 (comment))
Ken Jin suggested to restore the old optimization instead as the fix above the will result in quite bad performance, as it’s calling it on every function deallocation.
The PR will also include a tiny bugfix found in _Py_uop_sym_set_func_version
Will open a PR soon
CPython versions tested on:
3.15, CPython main branch
Operating systems tested on:
No response