gh-154936: Fix JSON control character error position - #154941
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serhiy-storchaka merged 1 commit intoJul 31, 2026
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Report the index of the invalid literal control character instead of the following index in the pure Python decoder.
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serhiy-storchaka
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needs backport to 3.13
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Thanks @yangbaechu for the PR, and @serhiy-storchaka for merging it 🌮🎉.. I'm working now to backport this PR to: 3.13, 3.14, 3.15. |
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GH-154974 is a backport of this pull request to the 3.15 branch. |
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GH-154975 is a backport of this pull request to the 3.14 branch. |
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GH-154976 is a backport of this pull request to the 3.13 branch. |
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Closes #154936.
Report the actual position of invalid literal control characters in the pure Python JSON decoder. Previously, the scanner passed
Match.end(), which points one character past the consumed control character, causingJSONDecodeError.pos,lineno, andcolnoto identify the following character instead.Use
end - 1only in the strict invalid-control-character branch and extend the existing ASCII control-character test to verify all three location attributes for U+0000 through U+001F. The shared JSON tests cover both the pure Python and C decoders.Tests
./python -m test test_jsonmake patchcheck