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gh-146261: Fix bug in `_Py_uop_sym_set_func_version` by Sacul0457 · Pull Request #146291 · python/cpython · GitHub

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gh-146261: Fix bug in _Py_uop_sym_set_func_version #146291

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Merged
Fidget-Spinner merged 2 commits into from
Mar 22, 2026
+1 −1
Conversation 3 Commits 2 Checks 70 Files changed 1
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gh-146261: Fix bug in _Py_uop_sym_set_func_version #146291

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b81201f
Restore Optimization and revert tests
Sacul0457 Mar 22, 2026
8a08593
revert and reduce change
Sacul0457 Mar 22, 2026
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2 changes: 1 addition & 1 deletion Python/optimizer_symbols.c
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Original file line number Diff line number Diff line change
Expand Up @@ -522,7 +522,7 @@ _Py_uop_sym_set_func_version(JitOptContext *ctx, JitOptRef ref, uint32_t version
case JIT_SYM_PREDICATE_TAG:
case JIT_SYM_TRUTHINESS_TAG:
sym_set_bottom(ctx, sym);
return true;
return false;

Fidget-Spinner Mar 22, 2026

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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

Sorry, can you just reduce the PR to just this line? I'm really sorry for taking up your time on this Sacul.

After staring at this more, I realised the original function watcher idea works, but needs a lot more work. I think this might be too complicated for a contributor to take, so I'll take over. Thanks for opening the issue again and for spotting this mistake of mine!

Sacul0457 Mar 22, 2026

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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

No worries, glad to be able to help where I can :)
case JIT_SYM_RECORDED_VALUE_TAG: {
PyObject *val = sym->recorded_value.value;
if (Py_TYPE(val) != &PyFunction_Type ||
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