[3.13] gh-133441: Fix STORE_ATTR_WITH_HINT bytecode #133446
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Deoptimize if the dict is a dict subclass.
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It looks like the offending code is on main as well. |
I failed to write code to trigger the bug on main, so I'm not sure that main is affected. |
Lib/test/test_dict.py
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| @@ -1594,6 +1594,24 @@ def make_pairs(): | |||
| self.assertEqual(d.get(key3_3), 44) | |||
| self.assertGreaterEqual(eq_count, 1) | |||
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| def test_store_attr_with_hint(self): | |||
| # gh-133441: Regression test for STORE_ATTR_WITH_HINT bytecode | |||
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This should be in test_opcache not test_dict IMO.
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I moved the test to test_opcache, but I'm not sure if TestInstanceDict is a good home for such test.
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@Fidget-Spinner: Do you think that the main branch is also affected? I'm unable to trigger the bug in the main branch, but the code looks the same. I would prefer to not deoptimize just for an hypothetical case if it cannot occur in practice. The code in the main branch is a little bit different. |
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@vstinner did you try wrapping the repro in a loop? Sometimes that might trigger it. I mean an actual Python for loop, not |
I just tried to put the reproducer in a loop: I still cannot reproduce the failure on the main branch. |
Misc/NEWS.d/next/Core_and_Builtins/2025-05-05-17-02-08.gh-issue-133441.EpjHD4.rst
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…e-133441.EpjHD4.rst Co-authored-by: Peter Bierma <[email protected]>
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Merged, thanks. |
Deoptimize if the dict is a dict subclass.
_PyEval_EvalFrameDefault#133441