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gh-156939: Detect buffer overflow in PyBytesWriter in debug mode #209184

gh-156939: Detect buffer overflow in PyBytesWriter in debug mode

gh-156939: Detect buffer overflow in PyBytesWriter in debug mode #209184

Triggered via pull request September 12, 2026 20:22
Status Failure
Total duration 35m 31s
Artifacts 3

build.yml

on: pull_request
Change detection  /  Create context from changed files
12s
Change detection / Create context from changed files
Matrix: Address sanitizer
Matrix: build-macos
Matrix: build-san
Matrix: Ubuntu SSL tests
Matrix: build-ubuntu
Matrix: build-windows
Matrix: cifuzz
Docs  /  Doctest
6m 36s
Docs / Doctest
Docs  /  Check EPUB
2m 22s
Docs / Check EPUB
Check if Autoconf files are up to date
25s
Check if Autoconf files are up to date
Check if generated files are up to date
4m 18s
Check if generated files are up to date
C API Docs  /  Check if all C APIs are documented
11s
C API Docs / Check if all C APIs are documented
Ubuntu (installed)  /  build, install and test
6m 45s
Ubuntu (installed) / build, install and test
iOS
23m 33s
iOS
Emscripten  /  build and test
14m 31s
Emscripten / build and test
WASI  /  build and test
4m 57s
WASI / build and test
Hypothesis tests on Ubuntu
10m 7s
Hypothesis tests on Ubuntu
Cross build Linux
5m 7s
Cross build Linux
Matrix: build-android
Docs  /  ...  /  Check for removed HTML IDs
2m 13s
Docs / Check for removed HTML IDs / Check for removed HTML IDs
All required checks pass
3s
All required checks pass
Fit to window
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Annotations

11 errors, 7 warnings, and 2 notices
Docs / Docs
Process completed with exit code 2.
Docs / Check EPUB
Process completed with exit code 1.
Ubuntu (installed) / build, install and test
Process completed with exit code 2.
Windows / Build and test (x64, tail-call)
Process completed with exit code 2.
Windows (free-threading) / Build and test (x64, tail-call)
Process completed with exit code 2.
Address sanitizer (ubuntu-26.04)
Process completed with exit code 2.
Sanitizers / TSan
Process completed with exit code 2.
Emscripten / build and test
Process completed with exit code 2.
Android (x86_64)
Process completed with exit code 1.
iOS
Process completed with exit code 1.
All required checks pass
Process completed with exit code 1.
Cross build Linux: Parser/lexer/string.c#L81
variable ‘previous_end’ set but not used [-Wunused-but-set-variable]
Ubuntu (installed) / build, install and test: Parser/lexer/string.c#L81
variable ‘previous_end’ set but not used [-Wunused-but-set-variable]
macOS / build and test (macos-26)
`$HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK` is set: not checking for outdated dependents or dependents with broken linkage!
Hypothesis tests on Ubuntu
No files were found with the provided path: /home/runner/work/cpython/cpython-builddir/.hypothesis/examples/. No artifacts will be uploaded.
macOS (free-threading) / build and test (macos-26)
`$HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK` is set: not checking for outdated dependents or dependents with broken linkage!
Address sanitizer (ubuntu-26.04): Parser/lexer/string.c#L81
variable ‘previous_end’ set but not used [-Wunused-but-set-variable]
macOS / build and test (macos-26-intel)
`$HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK` is set: not checking for outdated dependents or dependents with broken linkage!
Windows / Build and test (arm64, switch-case)
"The windows-11-arm label will migrate to use Visual Studio 2026 by default beginning September 21, 2026. For more information see https://github.com/actions/runner-images/issues/14602"
Windows (free-threading) / Build and test (arm64, switch-case)
"The windows-11-arm label will migrate to use Visual Studio 2026 by default beginning September 21, 2026. For more information see https://github.com/actions/runner-images/issues/14602"

Artifacts

Produced during runtime
Name Size Digest
TSan-logs-default
2.05 KB
sha256:f9a6f50bbc4f4fb541405f11bb608f46a6fe77c136fc425dbbe1481b05a7bfb9
UBSan-logs-default
1.59 KB
sha256:01874f6db87cf13434215c3c73faaafd345fc6e5573d76c0a11809d490e87030
html-ids-head.json.gz
126 KB
sha256:ac008b10adc12d6d931b72800358d99b356d5f0823ddbb4cd2597122b1760d28