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gh-156939: Detect buffer overflow in PyBytesWriter in debug mode #208837

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

gh-156939: Detect buffer overflow in PyBytesWriter in debug mode #208837

Triggered via pull request September 9, 2026 19:47
Status Cancelled
Total duration 7m 40s
Artifacts 2

build.yml

on: pull_request
Change detection  /  Create context from changed files
13s
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 15s
Docs / Doctest
Docs  /  Check EPUB
2m 27s
Docs / Check EPUB
Check if Autoconf files are up to date
32s
Check if Autoconf files are up to date
Check if generated files are up to date
4m 51s
Check if generated files are up to date
C API Docs  /  Check if all C APIs are documented
13s
C API Docs / Check if all C APIs are documented
Ubuntu (installed)  /  build, install and test
5m 17s
Ubuntu (installed) / build, install and test
iOS
5m 20s
iOS
Emscripten  /  build and test
5m 17s
Emscripten / build and test
WASI  /  build and test
5m 14s
WASI / build and test
Hypothesis tests on Ubuntu
5m 15s
Hypothesis tests on Ubuntu
Cross build Linux
5m 14s
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
5s
All required checks pass
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88 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 (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.
CIFuzz / cpython3 (undefined)
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
CIFuzz / cpython3 (undefined)
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.
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.
Android (x86_64)
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Android (x86_64)
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.
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.
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.
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.
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.
Docs / Doctest
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Docs / Doctest
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.
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.
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.
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
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Address sanitizer (ubuntu-26.04)
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Sanitizers / TSan
The operation was canceled.
Address sanitizer (ubuntu-26.04)
The operation was canceled.
WASI / build and test
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
WASI / build and test
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.
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.
Cross build Linux
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
Cross build Linux
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 / 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.
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.
iOS
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
iOS
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.
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)
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
macOS / build and test (macos-26)
The operation was canceled.
All required checks pass
Process completed with exit code 1.
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
Tests
Canceling since a higher priority waiting request for Tests-vstinner-writer_canary exists
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]
Ubuntu (installed) / build, install and test: Parser/lexer/string.c#L81
variable ‘previous_end’ set but not used [-Wunused-but-set-variable]
Cross build Linux: Parser/lexer/string.c#L81
variable ‘previous_end’ set but not used [-Wunused-but-set-variable]
macOS / build and test (macos-26-intel)
`$HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK` is set: not checking for outdated dependents or dependents with broken linkage!
macOS (free-threading) / build and test (macos-26)
`$HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK` is set: not checking for outdated dependents or dependents with broken linkage!
macOS / build and test (macos-26)
`$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
UBSan-logs-default
365 Bytes
sha256:6af0413e791d5ef8285b69a38eb5503ec65f84d07c2cec84f6b82777b0e28fad
html-ids-head.json.gz
126 KB
sha256:f41c43a05d5c994e87734c6f45e1a59442ca411f1f6f6c0d3c53ac970c7aad32