Skip to content

[3.14] gh-140576: Fixed crash produced by lexer in case of dedented zero byte (GH-140583) #140757

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
Oct 29, 2025
Merged

[3.14] gh-140576: Fixed crash produced by lexer in case of dedented zero byte (GH-140583) #140757

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
1 change: 1 addition & 0 deletions Lib/test/test_tokenize.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -3183,6 +3183,7 @@ def get_tokens(string):
f'__{
x:d
}__'""",
" a\n\x00",
]:
with self.subTest(case=case):
self.assertRaises(tokenize.TokenError, get_tokens, case)
Expand Down
2 changes: 2 additions & 0 deletions Misc/NEWS.d/next/Core_and_Builtins/2025-10-25-17-36-46.gh-issue-140576.kj0SCY.rst
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,2 @@
Fixed crash in :func:`tokenize.generate_tokens` in case of
specific incorrect input. Patch by Mikhail Efimov.
3 changes: 3 additions & 0 deletions Parser/lexer/lexer.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -539,6 +539,9 @@ tok_get_normal_mode(struct tok_state *tok, tokenizer_mode* current_tok, struct t
return MAKE_TOKEN(ERRORTOKEN);
}
}
else if (c == EOF && PyErr_Occurred()) {
return MAKE_TOKEN(ERRORTOKEN);
}
else {
break;
}
Expand Down
Loading