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sys.monitoring in 3.13+ does not trigger LINE event when there is no line break before

type-bugAn unexpected behavior, bug, or error

Status: Open.

#155992 In python/CPython;

· Oberon00 opened

on Aug 18, 2026

Negative lookbehind ignored under re.IGNORECASE | re.LOCALE

Status: Open.

#155985 In python/CPython;

· fedonman opened

on Aug 18, 2026

refleak.py reports spurious leaks due to int allocation

testsTests in the Lib/test dir

type-bugAn unexpected behavior, bug, or error

Status: Open.

#155981 In python/CPython;

· nascheme opened

on Aug 17, 2026

Memory leak in typeobject.c for slots update

topic-free-threading

type-bugAn unexpected behavior, bug, or error

Status: Open.

#155978 In python/CPython;

· nascheme opened

on Aug 17, 2026

Remove deprecated ast nodes sooner

pendingThe issue will be closed if no feedback is provided

type-featureA feature request or enhancement

Status: Open.

#155977 In python/CPython;

· Andrej730 opened

on Aug 17, 2026

set_term() does not refresh curses.LINES, COLS or COLORS

extension-modulesC modules in the Modules dir

type-bugAn unexpected behavior, bug, or error

Status: Open.

#155976 In python/CPython;

· fedonman opened

on Aug 17, 2026

addstr no longer restores the window attributes when the write fails

extension-modulesC modules in the Modules dir

type-bugAn unexpected behavior, bug, or error

Status: Open.

#155974 In python/CPython;

· fedonman opened

on Aug 17, 2026

math.tanpi is untested at its poles and no test-file flag fits

3.16new features, bugs and security fixes

extension-modulesC modules in the Modules dir

type-bugAn unexpected behavior, bug, or error

Status: Open.

#155966 In python/CPython;

· fedonman opened

on Aug 17, 2026

LOAD_ATTR does not specialize after replacing an instance's __dict__

type-bugAn unexpected behavior, bug, or error

Status: Open.

#155962 In python/CPython;

· koxudaxi opened

on Aug 17, 2026

sqlite3.Connection.execute() exposes unrepresentable Argument Clinic default

extension-modulesC modules in the Modules dir

topic-sqlite3

type-bugAn unexpected behavior, bug, or error

Status: Open.

#155952 In python/CPython;

· lpyu001 opened

on Aug 17, 2026

logging: SMTPHandler.emit() leaks the SMTP connection when sending fails

stdlibStandard Library Python modules in the Lib/ directory

type-bugAn unexpected behavior, bug, or error

Status: Open.

#155946 In python/CPython;

· americano212 opened

on Aug 17, 2026

xml.dom.domreg.getDOMImplementation: fallback discovery masks genuine bugs, not just "not installed"

pendingThe issue will be closed if no feedback is provided

testsTests in the Lib/test dir

type-featureA feature request or enhancement

Status: Open.

#155944 In python/CPython;

· tobiaspal opened

on Aug 17, 2026