Issues

GitHub Action MSan job: test_os.test_posix.test_fexecve() fails
python/cpython#158868 · opened on Oct 5, 2026
Improve performance of dict merges by avoiding incref/decref pairs
python/cpython#158863 · opened on Oct 5, 2026
xml.dom.minidom: Node.normalize() is quadratic in the number of adjacent text nodes
python/cpython#158860 · opened on Oct 5, 2026
tarfile stream writes get slower as copybufsize grows
python/cpython#158858 · opened on Oct 5, 2026
Enum creation is quadratic in the number of members (_hashable_values_ list scan)
python/cpython#158856 · opened on Oct 5, 2026
pegen: leader selection for left-recursive SCCs takes factorial time
python/cpython#158847 · opened on Oct 5, 2026
[C API] Add Py_SETREF() and Py_XSETREF() macros to the limited C API 3.16
python/cpython#158842 · opened on Oct 5, 2026
1
_pickle crashes when read() returns a bytes subclass for large payloads
python/cpython#158841 · opened on Oct 5, 2026
2
LogRecord should normalize falsy exc_info values
python/cpython#158839 · opened on Oct 5, 2026
csv.reader do not preserve line return in quoted values
python/cpython#158837 · opened on Oct 5, 2026
A pair of problems with the introductory section to the "8. Compound statements" chapter.
python/cpython#158836 · opened on Oct 5, 2026
Module __getattr__ shadows a module's own lazy imports
python/cpython#158824 · opened on Oct 5, 2026
Segfault when a finalizer declares or resolves a lazy import during shutdown
python/cpython#158820 · opened on Oct 5, 2026
Skip useless hash table probe when deleting from split dicts
python/cpython#158816 · opened on Oct 5, 2026
_SEND_ASYNC_GEN_TIER_TWO side exit corrupts the stack when an async generator returns
python/cpython#158804 · opened on Oct 4, 2026
Segfault in bytes.join for mutating list
python/cpython#158803 · opened on Oct 4, 2026
"hashable collections" in the object.__hash__ documentation is misleading
python/cpython#158798 · opened on Oct 4, 2026
4
Update the docs for test.support.import_helper
python/cpython#158797 · opened on Oct 4, 2026
4
Compiler warning: instruction_funcptr_tracing_table defined but not used with --with-tail-call-interp
python/cpython#158795 · opened on Oct 4, 2026
Improve performance for list.insert() and del list[i] in free-threaded builds
python/cpython#158790 · opened on Oct 4, 2026
1
Vectorcall optimization can bypass a custom metaclass's __call__
python/cpython#158788 · opened on Oct 4, 2026
PyMonitoring_FirePyStartEvent results in incorrect duplicate calls to sys.setprofile profile functions
python/cpython#158711 · opened on Oct 4, 2026
3
os.environ['VAR'] = '' is not portable (windows)
python/cpython#158694 · opened on Oct 4, 2026
3
profiling.sampling dump --async-aware crashes on a deep chain of awaiting tasks
python/cpython#158688 · opened on Oct 3, 2026
Speed up pattern matching via shared checks
python/cpython#158687 · opened on Oct 3, 2026
11