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Fully single-module lazy imports are not recorded in <code>sys.lazy_modules</code>

3.15new features, bugs and security fixesnew features, bugs and security fixes

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

Status: Open.

#145059 In python/cpython;

·johnslavik openedon Feb 20, 2026

Assertion failure from <code>__lazy_import__(b"")</code>

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

topic-importlib

type-crashA hard crash of the interpreter, possibly with a core dumpA hard crash of the interpreter, possibly with a core dump

Status: Open.

#145058 In python/cpython;

·devdanzin openedon Feb 20, 2026

Reflect it that <code>sys.lazy_modules</code> is no longer a flat set

3.15new features, bugs and security fixesnew features, bugs and security fixes

stdlibStandard Library Python modules in the Lib/ directoryStandard Library Python modules in the Lib/ directory

type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

Status: Open.

#145057 In python/cpython;

·johnslavik openedon Feb 20, 2026

Many pure python tools that have a special cases for dict should accept frozendict as well.

stdlibStandard Library Python modules in the Lib/ directoryStandard Library Python modules in the Lib/ directory

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#145056 In python/cpython;

·rhettinger openedon Feb 20, 2026

The globals argument to eval() should accept frozendict

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

Status: Open.

#145055 In python/cpython;

·rhettinger openedon Feb 20, 2026

Python is being put into an idle state by Windows and stops responding

OS-windows

pendingThe issue will be closed if no feedback is providedThe issue will be closed if no feedback is provided

type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

Status: Open.

#145048 In python/cpython;

·mikealvarrez openedon Feb 20, 2026

Ensuring good specialization while making progress in jitted code

3.15new features, bugs and security fixesnew features, bugs and security fixes

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

topic-JIT

Status: Open.

#145047 In python/cpython;

·markshannon openedon Feb 20, 2026

Increase performance in unsafe_object_compare by not using Py_DECREF() for immortal res_obj

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

performancePerformance or resource usagePerformance or resource usage

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#145044 In python/cpython;

·benediktjohannes openedon Feb 20, 2026

NULL dereference in _sqlite when connection is closed inside aggregate step callback

extension-modulesC modules in the Modules dirC modules in the Modules dir

topic-sqlite3

type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

Status: Open.

#145040 In python/cpython;

·raminfp openedon Feb 20, 2026

Emscripten: Trampoline doesn't work with emcc 4.0.19 due to table/memory visibility

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

OS-emscripten

type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

Status: Open.

#145037 In python/cpython;

·hoodmane openedon Feb 20, 2026

Possible data race in <code>list.__sizeof__()</code> with free-threading build

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

topic-free-threading

type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

Status: Open.

#145036 In python/cpython;

·Naserume openedon Feb 20, 2026

Allow omitting <code>_pyrepl</code> module

3.15new features, bugs and security fixesnew features, bugs and security fixes

extension-modulesC modules in the Modules dirC modules in the Modules dir

topic-replRelated to the interactive shellRelated to the interactive shell

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#145035 In python/cpython;

·zooba openedon Feb 20, 2026