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[3.15] gh-153539: Fix use-after-free in TextIOWrapper.tell() with a reentrant decoder (GH-153540) #206683

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[3.15] gh-153539: Fix use-after-free in TextIOWrapper.tell() with a reentrant decoder (GH-153540)

[3.15] gh-153539: Fix use-after-free in TextIOWrapper.tell() with a reentrant decoder (GH-153540) #206683

Triggered via pull request August 21, 2026 15:27
@serhiy-storchakaserhiy-storchaka
opened #156193
serhiy-storchaka:backport-153539-3.15
Status Success
Total duration 32m 28s
Artifacts 2

build.yml

on: pull_request
Change detection  /  Create context from changed files
17s
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-msi
Waiting for pending jobs
Matrix: build-windows
Matrix: cifuzz
Waiting for pending jobs
Docs  /  Doctest
6m 57s
Docs / Doctest
Docs  /  Check EPUB
2m 33s
Docs / Check EPUB
Check if Autoconf files are up to date
39s
Check if Autoconf files are up to date
Check if generated files are up to date
4m 30s
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
6m 16s
Ubuntu (installed) / build, install and test
iOS
19m 53s
iOS
Emscripten  /  build and test
21m 47s
Emscripten / build and test
WASI  /  build and test
5m 17s
WASI / build and test
Hypothesis tests on Ubuntu
9m 2s
Hypothesis tests on Ubuntu
Cross build Linux
4m 48s
Cross build Linux
Docs  /  Docs
2m 28s
Docs / Docs
Check if the ABI has changed
1m 40s
Check if the ABI has changed
Matrix: build-android
Docs  /  ...  /  Check for removed HTML IDs
2m 15s
Docs / Check for removed HTML IDs / Check for removed HTML IDs
All required checks pass
5s
All required checks pass
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2 errors and 7 warnings
Docs / Docs
Process completed with exit code 2.
Docs / Check EPUB
Process completed with exit code 1.
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)
`$HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK` is set: not checking for outdated dependents or dependents with broken linkage!
macOS (free-threading) / build and test (macos-26)
The following taps are not trusted: aws/tap Homebrew is currently ignoring formulae, casks and commands from these taps because tap trust is required. Untap them with: brew untap aws/tap Trust specific formulae, casks and commands with: brew trust --formula <user>/<tap>/<formula> brew trust --cask <user>/<tap>/<cask> brew trust --command <user>/<tap>/<command> Whole-tap trust is broader and includes all current and future formulae, casks and commands from the listed taps. Trust whole taps with: brew trust aws/tap To disable trust checks: export HOMEBREW_NO_REQUIRE_TAP_TRUST=1 This is not recommended and will be removed in a later release. For more information, see: https://docs.brew.sh/Tap-Trust
macOS / build and test (macos-26)
`$HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK` is set: not checking for outdated dependents or dependents with broken linkage!
macOS / build and test (macos-26)
The following taps are not trusted: aws/tap Homebrew is currently ignoring formulae, casks and commands from these taps because tap trust is required. Untap them with: brew untap aws/tap Trust specific formulae, casks and commands with: brew trust --formula <user>/<tap>/<formula> brew trust --cask <user>/<tap>/<cask> brew trust --command <user>/<tap>/<command> Whole-tap trust is broader and includes all current and future formulae, casks and commands from the listed taps. Trust whole taps with: brew trust aws/tap To disable trust checks: export HOMEBREW_NO_REQUIRE_TAP_TRUST=1 This is not recommended and will be removed in a later release. For more information, see: https://docs.brew.sh/Tap-Trust
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-intel)
The following taps are not trusted: aws/tap Homebrew is currently ignoring formulae, casks and commands from these taps because tap trust is required. Untap them with: brew untap aws/tap Trust specific formulae, casks and commands with: brew trust --formula <user>/<tap>/<formula> brew trust --cask <user>/<tap>/<cask> brew trust --command <user>/<tap>/<command> Whole-tap trust is broader and includes all current and future formulae, casks and commands from the listed taps. Trust whole taps with: brew trust aws/tap To disable trust checks: export HOMEBREW_NO_REQUIRE_TAP_TRUST=1 This is not recommended and will be removed in a later release. For more information, see: https://docs.brew.sh/Tap-Trust

Artifacts

Produced during runtime
Name Size Digest
UBSan-logs-default
1.61 KB
sha256:807479139531b9f29f4738024df788b58d23a1373ce55e51a3d7defe7de858a8
html-ids-head.json.gz
124 KB
sha256:adce0c30a50628aa0e2ea560072e9d89891b31930414d40987463210da56a5d1