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[mypyc] Implement <code>str.lower()</code> and <code>str.upper()</code> primitive

topic-mypycmypyc bugsmypyc bugs

Status: Draft (not ready).

python/mypynumber 19375

#19375 In python/mypy;

· Jahongir-Qurbonov opened on Jul 4, 2025

Mypyc produces module that crashes (segmentation fault) when executed

crash

topic-mypycmypyc bugsmypyc bugs

Status: Open.

#18992 In python/mypy;

· svalentin opened on Apr 28, 2025

Mypyc: Crash when using property deleter

crash

topic-descriptorsProperties, class vs. instance attributesProperties, class vs. instance attributes

topic-mypycmypyc bugsmypyc bugs

Status: Open.

#17928 In python/mypy;

· aatle opened on Oct 13, 2024

Mypyc should support <code>__file__</code>

feature

topic-mypycmypyc bugsmypyc bugs

Status: Open.

#17795 In python/mypy;

· CoolCat467 opened on Sep 20, 2024

AssertionError in make_module_translation_map

crash

topic-mypycmypyc bugsmypyc bugs

Status: Open.

#17072 In python/mypy;

· justinc1 opened on Mar 28, 2024

‘CPyModule__ctypes’ undeclared

bugmypy got something wrongmypy got something wrong

topic-mypycmypyc bugsmypyc bugs

Status: Open.

#16687 In python/mypy;

· juhasch opened on Dec 20, 2023

<code>mypy</code> 1.7.1 build error on <code>ppc</code>: <code>FATAL: Section too large, can't encode r_address (0x109e874) into 24-bits of scattered relocation entry</code>

bugmypy got something wrongmypy got something wrong

topic-mypycmypyc bugsmypyc bugs

Status: Open.

#16684 In python/mypy;

· barracuda156 opened on Dec 20, 2023

Refurb crashes on Mypy 1.7.0

bugmypy got something wrongmypy got something wrong

question

topic-mypycmypyc bugsmypyc bugs

Status: Open.

#16497 In python/mypy;

· dosisod opened on Nov 15, 2023

mypyc: Any subclass of BytesIO will always generate an exception when instantiated

bugmypy got something wrongmypy got something wrong

topic-mypycmypyc bugsmypyc bugs

Status: Open.

#16209 In python/mypy;

· bertbarabas opened on Oct 1, 2023

<code>_PyType_Lookup: Assertion </code>!PyErr_Occurred()' failed.<code> in two </code>mypyc/test/test_run.py` tests

crash

good-second-issue

topic-mypycmypyc bugsmypyc bugs

Status: Open.

#16043 In python/mypy;

· mgorny opened on Sep 4, 2023

Read/write property does not work with "allow_interpreted_subclasses"

bugmypy got something wrongmypy got something wrong

topic-mypycmypyc bugsmypyc bugs

Status: Open.

#15828 In python/mypy;

· feibl opened on Aug 8, 2023

Mypyc crashes on conditionally-defined class

crash

topic-mypycmypyc bugsmypyc bugs

Status: Open.

#15716 In python/mypy;

· nickdrozd opened on Jul 19, 2023