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gh-156939: Detect buffer overflow in PyBytesWriter in debug mode #209182

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

gh-156939: Detect buffer overflow in PyBytesWriter in debug mode #209182

Triggered via pull request September 12, 2026 20:17
Status Cancelled
Total duration 8m 5s
Artifacts 2

build.yml

on: pull_request
Change detection  /  Create context from changed files
10s
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
5m 22s
Docs / Doctest
Docs  /  Check EPUB
2m 5s
Docs / Check EPUB
Check if Autoconf files are up to date
37s
Check if Autoconf files are up to date
Check if generated files are up to date
4m 28s
Check if generated files are up to date
C API Docs  /  Check if all C APIs are documented
10s
C API Docs / Check if all C APIs are documented
Ubuntu (installed)  /  build, install and test
5m 18s
Ubuntu (installed) / build, install and test
iOS
7m 32s
iOS
Emscripten  /  build and test
5m 19s
Emscripten / build and test
WASI  /  build and test
4m 54s
WASI / build and test
Hypothesis tests on Ubuntu
5m 41s
Hypothesis tests on Ubuntu
Cross build Linux
4m 39s
Cross build Linux
Matrix: build-android
Docs  /  ...  /  Check for removed HTML IDs
2m 11s
Docs / Check for removed HTML IDs / Check for removed HTML IDs
All required checks pass
4s
All required checks pass
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Annotations

84 errors, 7 warnings, and 2 notices
Docs / Docs
Process completed with exit code 2.
Docs / Check EPUB
Process completed with exit code 1.
CIFuzz / cpython3 (undefined)
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
CIFuzz / cpython3 (undefined)
The operation was canceled.
CIFuzz / cpython3 (address)
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
CIFuzz / cpython3 (address)
The operation was canceled.
CIFuzz / cpython3 (memory)
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
CIFuzz / cpython3 (memory)
The operation was canceled.
Windows / Build and test (x64, tail-call)
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Windows / Build and test (x64, tail-call)
The operation was canceled.
Windows / Build and test (Win32, switch-case)
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Windows / Build and test (Win32, switch-case)
The operation was canceled.
Windows / Build and test (arm64, switch-case)
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Windows / Build and test (arm64, switch-case)
The operation was canceled.
Ubuntu (free-threading) / build and test (ubuntu-26.04)
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Ubuntu (free-threading) / build and test (ubuntu-26.04)
The operation was canceled.
Sanitizers / TSan (free-threading)
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Sanitizers / TSan (free-threading)
The operation was canceled.
Emscripten / build and test
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Emscripten / build and test
The operation was canceled.
Ubuntu (installed) / build, install and test
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Ubuntu (installed) / build, install and test
The operation was canceled.
Windows (free-threading) / Build and test (x64, switch-case)
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Windows (free-threading) / Build and test (x64, switch-case)
The operation was canceled.
Docs / Doctest
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Docs / Doctest
The operation was canceled.
Sanitizers / TSan
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Sanitizers / TSan
The operation was canceled.
Sanitizers / UBSan
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Sanitizers / UBSan
The operation was canceled.
Ubuntu (bolt) / build and test (ubuntu-26.04)
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Ubuntu (bolt) / build and test (ubuntu-26.04)
The operation was canceled.
macOS (free-threading) / build and test (macos-26)
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
macOS (free-threading) / build and test (macos-26)
The operation was canceled.
macOS / build and test (macos-26-intel)
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
macOS / build and test (macos-26-intel)
The operation was canceled.
Ubuntu (free-threading) / build and test (ubuntu-26.04-arm)
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Ubuntu (free-threading) / build and test (ubuntu-26.04-arm)
The operation was canceled.
Windows / Build and test (x64, switch-case)
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Windows / Build and test (x64, switch-case)
The operation was canceled.
Ubuntu / build and test (ubuntu-26.04-arm)
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Ubuntu / build and test (ubuntu-26.04-arm)
The operation was canceled.
macOS / build and test (macos-26)
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
macOS / build and test (macos-26)
The operation was canceled.
Android (x86_64)
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Android (x86_64)
The operation was canceled.
Hypothesis tests on Ubuntu
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Hypothesis tests on Ubuntu
The operation was canceled.
Address sanitizer (ubuntu-26.04)
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Address sanitizer (ubuntu-26.04)
The operation was canceled.
Windows (free-threading) / Build and test (x64, tail-call)
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Windows (free-threading) / Build and test (x64, tail-call)
The operation was canceled.
Ubuntu / build and test (ubuntu-26.04)
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Ubuntu / build and test (ubuntu-26.04)
The operation was canceled.
Windows (free-threading) / Build and test (arm64, switch-case)
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Windows (free-threading) / Build and test (arm64, switch-case)
The operation was canceled.
iOS
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
iOS
The operation was canceled.
All required checks pass
Process completed with exit code 1.
Tests
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Tests
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Tests
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Tests
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Tests
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Tests
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Tests
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Tests
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Tests
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Tests
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Tests
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Tests
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Tests
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Tests
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Tests
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Tests
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Tests
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Tests
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Tests
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Tests
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Tests
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Tests
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Tests
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Tests
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Tests
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
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 (free-threading) / build and test (macos-26)
`$HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK` is set: not checking for outdated dependents or dependents with broken linkage!
macOS / build and test (macos-26-intel)
`$HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK` is set: not checking for outdated dependents or dependents with broken linkage!
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.
Address sanitizer (ubuntu-26.04): Parser/lexer/string.c#L81
variable ‘previous_end’ set but not used [-Wunused-but-set-variable]
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
UBSan-logs-default
364 Bytes
sha256:70728edddaba373926572b65789fa7b7fa576ebf8bdfa72036ac21eeab223c48
html-ids-head.json.gz
126 KB
sha256:cbf4a8fa2130bf71174de99413f285e65aa2721d6c365573a5c1511b1d492d4b