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gh-140947: fix contextvars handling for server tasks in asyncio - #141158
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kumaraditya303 merged 17 commits intoMar 21, 2026
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Kludex
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Nov 17, 2025
Any chance this can be considered a security issue? |
kumaraditya303
commented
Nov 17, 2025
ContributorAuthor
There are a lot of moving parts in fixing this and this PR only fixes the non-ssl part, ssl remains remains to be fixed. |
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Mar 21, 2026
🤖 New build scheduled with the buildbot fleet by @kumaraditya303 for commit a2039d6 🤖 Results will be shown at: https://buildbot.python.org/all/#/grid?branch=refs%2Fpull%2F141158%2Fmerge If you want to schedule another build, you need to add the 🔨 test-with-buildbots label again. |
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Mar 21, 2026
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I restarted the buildbot server. It seems like buildbot workers are now working properly again. |
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CuriousLearner added a commit
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Mar 22, 2026
* upstream/main: (1475 commits) Docs: replace all `datetime` imports with `import datetime as dt` (python#145640) pythongh-146153: Use `frozendict` in pure python fallback for `curses.has_key` (python#146154) pythongh-138234: clarify returncode behavior for subprocesses created with `shell=True` (python#138536) pythongh-140947: fix contextvars handling for server tasks in asyncio (python#141158) pythonGH-100108: Add async generators best practices section (python#141885) pythonGH-145667: Merge `GET_ITER` and `GET_YIELD_FROM_ITER` (pythonGH-146120) pythongh-146228: Better fork support in cached FastPath (python#146231) pythongh-146227: Fix wrong type in _Py_atomic_load_uint16 in pyatomic_std.h (pythongh-146229) pythongh-145980: Fix copy/paste mistake in binascii.c (python#146230) pythongh-146092: Raise MemoryError on allocation failure in _zoneinfo (python#146165) pythongh-91279: Note `SOURCE_DATE_EPOCH` support in `ZipFile.writestr()` doc (python#139396) pythongh-146196: Fix Undefined Behavior in _PyUnicodeWriter_WriteASCIIString() (python#146201) pythongh-143930: Reject leading dashes in webbrowser URLs pythongh-145916: Soft-deprecate ctypes.util.find_library (pythonGH-145919) pythongh-146205: Check the errno with != 0 in close impls in select module (python#146206) pythongh-146171: Fix nested AttributeError suggestions (python#146188) pythongh-146099: Optimize _GUARD_CODE_VERSION+IP via function version symbols (pythonGH-146101) pythongh-145980: Add support for alternative alphabets in the binascii module (pythonGH-145981) pythongh-145754: Update signature retrieval in unittest.mock to use forwardref annotation format (python#145756) pythongh-145177: Add emscripten run --test, uses test args from config.toml (python#146160) ...
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Kludex added a commit
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Apr 21, 2026
Reintroduces the behavior from #2742 as an opt-in flag. When set, each ASGI request runs in a fresh contextvars.Context, which works around the asyncio context leak in python/cpython#140947 (expected to be fixed upstream for Python >=3.15 via python/cpython#141158). Default is off so context set in the lifespan or by external instrumentation (e.g. OpenTelemetry eBPF propagation) remains visible to ASGI handlers.
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ljfp pushed a commit
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Apr 25, 2026
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