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asyncio.subprocess blocked event loop unexpectedly on MacOS
stdlibStandard Library Python modules in the Lib/ directoryStandard Library Python modules in the Lib/ directorytype-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or errorStatus: Open.#158287 In python/cpython;_socket.ALG_SET_PUBKEY is a wrong internal value from libkcapi (changed in 2022)
extension-modulesC modules in the Modules dirC modules in the Modules dirtopic-socketRelated to the socket, socketserver and selectors modulesRelated to the socket, socketserver and selectors modulestype-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or errorStatus: Open.#158285 In python/cpython;Computed-goto interpreter 9–11% slower when built with Clang 19 or Xcode 16.3–16.4: dispatch jumps are merged
buildThe build process and cross-buildThe build process and cross-buildperformancePerformance or resource usagePerformance or resource usagetype-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or errorStatus: Open.#158283 In python/cpython;sqlite3 CLI completer: include views in column completion
stdlibStandard Library Python modules in the Lib/ directoryStandard Library Python modules in the Lib/ directorytype-featureA feature request or enhancementA feature request or enhancementStatus: Open.#158277 In python/cpython;_pyrepl: Reader.suspend() discards buffer, pos, and kill_ring
pendingThe issue will be closed if no feedback is providedThe issue will be closed if no feedback is providedstdlibStandard Library Python modules in the Lib/ directoryStandard Library Python modules in the Lib/ directorytopic-replRelated to the interactive shellRelated to the interactive shelltype-featureA feature request or enhancementA feature request or enhancementStatus: Open.#158273 In python/cpython;json: Speed up
json.dump()with non-default options.performancePerformance or resource usagePerformance or resource usagestdlibStandard Library Python modules in the Lib/ directoryStandard Library Python modules in the Lib/ directorytype-featureA feature request or enhancementA feature request or enhancementStatus: Open.#158270 In python/cpython;C implementation for strptime
extension-modulesC modules in the Modules dirC modules in the Modules dirtype-featureA feature request or enhancementA feature request or enhancementStatus: Open.#158252 In python/cpython;3.14: Windows on Arm build fails since windows-11-arm migrated to windows-11-vs2026-arm
3.14bugs and security fixesbugs and security fixesbuildThe build process and cross-buildThe build process and cross-buildinfraCI, GitHub Actions, buildbots, Dependabot, etc.CI, GitHub Actions, buildbots, Dependabot, etc.Status: Open.#158244 In python/cpython;Double release of
PyBytesWriterinassemble_init()error path corrupts the bytes writer freelistinterpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)type-crashA hard crash of the interpreter, possibly with a core dumpA hard crash of the interpreter, possibly with a core dumpStatus: Open.#158241 In python/cpython;Performance regression:
asyncio.gather()is slower and uses more memory since gh-157213performancePerformance or resource usagePerformance or resource usagestdlibStandard Library Python modules in the Lib/ directoryStandard Library Python modules in the Lib/ directorytype-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or errorStatus: Open.#158239 In python/cpython;Remove unnecessary loads "critical_section" from
_PyCriticalSection_SuspendAllinterpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)performancePerformance or resource usagePerformance or resource usageStatus: Open.#158235 In python/cpython;tracemalloc: _compare_grouped_stats mutates old_group, and a typo in _group_by
stdlibStandard Library Python modules in the Lib/ directoryStandard Library Python modules in the Lib/ directorytype-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or errorStatus: Open.#158234 In python/cpython;