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Issues list
Creating a subinterpreter when Python is run with -X tracemalloc leads to segfault 3.14bugs and security fixes 3.15new features, bugs and security fixes topic-subinterpreters type-crashA hard crash of the interpreter, possibly with a core dump
#134604 openedMay 23, 2025 byemmatyping
[3.12] Fix use-after-free in the unicode-escape decoder with error handler (GH-133767) awaiting review topic-unicode type-crashA hard crash of the interpreter, possibly with a core dump type-securityA security issue
#134255 openedMay 19, 2025 bymceplLoading…
Random segfaults on Python 3.12.10 during CI testing pendingThe issue will be closed if no feedback is provided type-crashA hard crash of the interpreter, possibly with a core dump
#134193 openedMay 18, 2025 byMilesCranmer
segfault in gc with 3.14.0b1, trio and pytest 3.14bugs and security fixes 3.15new features, bugs and security fixes interpreter-core(Objects, Python, Grammar, and Parser dirs) type-crashA hard crash of the interpreter, possibly with a core dump
#133932 openedMay 12, 2025 byjakkdl
Use-after-free inonly security fixes 3.10only security fixes 3.11only security fixes 3.12only security fixes 3.13bugs and security fixes 3.14bugs and security fixes 3.15new features, bugs and security fixes interpreter-core(Objects, Python, Grammar, and Parser dirs) release-blocker topic-unicode type-crashA hard crash of the interpreter, possibly with a core dump type-securityA security issue
unicode_escape decoder with error handler 3.9 #133767 openedMay 9, 2025 bysethmlarson
Regression in Python 3.14.0a7. 3.14bugs and security fixes interpreter-core(Objects, Python, Grammar, and Parser dirs) type-crashA hard crash of the interpreter, possibly with a core dump
#133352 openedMay 3, 2025 byfelixxm
Preventing the use of a null pointer in mro_hierarchy interpreter-core(Objects, Python, Grammar, and Parser dirs) type-crashA hard crash of the interpreter, possibly with a core dump
#132835 openedApr 23, 2025 bysmurav
Abort from calling(Objects, Python, Grammar, and Parser dirs) type-crashA hard crash of the interpreter, possibly with a core dump
OrderedDict.setdefault with an invalid value interpreter-core #132461 openedApr 13, 2025 bydevdanzin
SIGSEV inC modules in the Modules dir type-crashA hard crash of the interpreter, possibly with a core dump
datetime.timedelta (possibly from datetime's Cdelta_new) extension-modules #132413 openedApr 11, 2025 byJacoblightning
Concurrent deallocation of threads while calling(Objects, Python, Grammar, and Parser dirs) topic-C-API topic-free-threading type-crashA hard crash of the interpreter, possibly with a core dump
PyEval_SetTrace interpreter-core #132296 openedApr 9, 2025 bydevdanzin
Crash (AccessViolation) runningA hard crash of the interpreter, possibly with a core dump
py -m ensurepip from windows docker containerpython:3.12 OS-windows topic-ensurepip type-crash #131795 openedMar 27, 2025 byinbilla
DECREF_INPUTS() should be escaping 3.14 #131688 openedMar 24, 2025 bybrandtbucher
Unrecoverable stack overflow with infinite recursion on macOS interpreter-core(Objects, Python, Grammar, and Parser dirs) OS-mac type-crashA hard crash of the interpreter, possibly with a core dump
#131543 openedMar 21, 2025 bytomMoral
Use after free (stackref borrow after close) in(Objects, Python, Grammar, and Parser dirs) type-crashA hard crash of the interpreter, possibly with a core dump
BINARY_OP_INPLACE_ADD_UNICODE interpreter-core #130786 openedMar 3, 2025 bymarkshannon
Use after free inbugs and security fixes 3.14bugs and security fixes interpreter-core(Objects, Python, Grammar, and Parser dirs) type-crashA hard crash of the interpreter, possibly with a core dump
PyDict_Clear() due to re-entrancy 3.13 #130555 openedFeb 25, 2025 bycolesbury
segmentfault when pip installing setuptools buildThe build process and cross-build interpreter-core(Objects, Python, Grammar, and Parser dirs) type-crashA hard crash of the interpreter, possibly with a core dump
#129992 openedFeb 11, 2025 bykemier
Failed assertion inonly security fixes 3.13bugs and security fixes 3.14bugs and security fixes interpreter-core(Objects, Python, Grammar, and Parser dirs) type-crashA hard crash of the interpreter, possibly with a core dump
_PyUnicode_Equal fromcalculate_suggestions with non-string candidate 3.12 #129573 openedFeb 2, 2025 bydevdanzin
Fatal Python error: _enter_buffered_busy: could not acquire lock for <_io.BufferedWriter name='<stderr>'> at interpreter shutdown, possibly due to daemon threads interpreter-core(Objects, Python, Grammar, and Parser dirs) pendingThe issue will be closed if no feedback is provided type-crashA hard crash of the interpreter, possibly with a core dump
#129536 openedFeb 1, 2025 byShaneHarvey
test_call.test_super_deep started segfaulting with 3.14.0a4 freethreading tests #128954 openedJan 17, 2025 bymgorny
test_free_threading.test_monitoring.SetProfileMultiThreaded.test_instrumentation crashes intermittently interpreter-core #128806 openedJan 14, 2025 bympage
test_free_threading.test_type.TestType.test_attr_cache_consistency crashes intermittently tests #128804 openedJan 13, 2025 bympage
Subinterpreters don't properly clean up threads 3.13bugs and security fixes 3.14bugs and security fixes extension-modulesC modules in the Modules dir topic-subinterpreters type-crashA hard crash of the interpreter, possibly with a core dump
#128639 openedJan 8, 2025 byZeroIntensity
Segfault when updating from 3.13.0 to 3.13.1 while Python is running 3.13bugs and security fixes interpreter-core(Objects, Python, Grammar, and Parser dirs) OS-linux topic-email type-bugAn unexpected behavior, bug, or error type-crashA hard crash of the interpreter, possibly with a core dump
#128341 openedDec 30, 2024 byhroncok
Failed assertion inA hard crash of the interpreter, possibly with a core dump
Python/legacy_tracing.c:431 on a free-threading build topic-free-threading type-crash #127235 openedNov 24, 2024 bydevdanzin
Assertion failures frombugs and security fixes 3.14bugs and security fixes extension-modulesC modules in the Modules dir topic-subinterpreters type-crashA hard crash of the interpreter, possibly with a core dump
_interpchannels._register_end_types 3.13 #127234 openedNov 24, 2024 bydevdanzin
ProTip! What’s not been updated in a month:updated:<2025-04-23.