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Description
Bug report
Bug description:
I’ve just started seeing a Valgrind (1:3.18.1-1ubuntu2) warning in a Linux (ubuntu-22.04) Github test that started happening today when the Python version changed from 3.12.4 to 3.12.5.
The test is the pytest test suite in PyMuPDF - seehttps://github.com/pymupdf/PyMuPDF/actions/workflows/test-valgrind.yml.
There were no changes to PyMuPDF or MuPDF when the Valgrind warning appeared and Valgrind itself and pytest versions have also not changed. So it looks like the only change is Python itself.
Conditional jump or move depends on uninitialised value(s) at 0x4A66154: tok_get_fstring_mode (/home/runner/work/_temp/SourceCode/Parser/tokenizer.c:2705) by 0x4A63925: tok_get (/home/runner/work/_temp/SourceCode/Parser/tokenizer.c:2857) by 0x4A63925: _PyTokenizer_Get (/home/runner/work/_temp/SourceCode/Parser/tokenizer.c:2862) by 0x4A5282D: _PyPegen_fill_token (/home/runner/work/_temp/SourceCode/Parser/pegen.c:298) by 0x4A62BAF: fstring_replacement_field_rule (/home/runner/work/_temp/SourceCode/Parser/parser.c:15914) by 0x4A58F7A: fstring_middle_rule (/home/runner/work/_temp/SourceCode/Parser/parser.c:15858) by 0x4A58F7A: _loop0_114_rule (/home/runner/work/_temp/SourceCode/Parser/parser.c:32096) by 0x4A58F7A: fstring_rule (/home/runner/work/_temp/SourceCode/Parser/parser.c:16193) by 0x4A58F7A: _tmp_259_rule (/home/runner/work/_temp/SourceCode/Parser/parser.c:40681) by 0x4A58F7A: _loop1_115_rule (/home/runner/work/_temp/SourceCode/Parser/parser.c:32163) by 0x4A58F7A: strings_rule (/home/runner/work/_temp/SourceCode/Parser/parser.c:16294) by 0x4A580A7: atom_rule (/home/runner/work/_temp/SourceCode/Parser/parser.c:14690) by 0x4A60048: primary_raw (/home/runner/work/_temp/SourceCode/Parser/parser.c:14328) by 0x4A5FCE8: primary_rule (/home/runner/work/_temp/SourceCode/Parser/parser.c:14126) by 0x4A5F731: await_primary_rule (/home/runner/work/_temp/SourceCode/Parser/parser.c:14080) by 0x4A5F731: power_rule (/home/runner/work/_temp/SourceCode/Parser/parser.c:13956) by 0x4A5F731: factor_rule (/home/runner/work/_temp/SourceCode/Parser/parser.c:13906) by 0x4A5ECDE: term_raw (/home/runner/work/_temp/SourceCode/Parser/parser.c:13747) by 0x4A5E9C0: term_rule (/home/runner/work/_temp/SourceCode/Parser/parser.c:13509) by 0x4A5E80A: sum_raw (/home/runner/work/_temp/SourceCode/Parser/parser.c:13391) by 0x4A5E80A: sum_rule (/home/runner/work/_temp/SourceCode/Parser/parser.c:13342)I can look at creating a cut-down reproducer if required.
Thanks,
- Julian
CPython versions tested on:
3.12
Operating systems tested on:
Linux
Linked PRs
- gh-123229: Fix valgrind warning by initializing the f-string buffers to 0 in the tokenizer #123263
- [3.13] gh-123229: Fix valgrind warning by initializing the f-string buffers to 0 in the tokenizer (GH-123263) #123264
- [3.12] gh-123229: Fix valgrind warning by initializing the f-string buffers to 0 in the tokenizer (GH-123263) #123265