Search results

python-version based syntax checks should not block

feature

topic-error-reportingHow we report errorsHow we report errors

topic-pep-695Issues related to PEP 695 syntaxIssues related to PEP 695 syntax

Status: Open.

#21178 In python/mypy;

· A5rocks opened on Apr 6, 2026

Very bad performance with SQLite cache (on a Linux machine with HDD)

bugmypy got something wrongmypy got something wrong

performance

Status: Open.

#21176 In python/mypy;

· ilevkivskyi opened on Apr 5, 2026

Issue with Narrowing

bugmypy got something wrongmypy got something wrong

Status: Open.

#21173 In python/mypy;

· George-Ogden opened on Apr 5, 2026

Overlapping overloads false positive with ParamSpec shenanigans

bugmypy got something wrongmypy got something wrong

topic-overloads

topic-paramspecPEP 612, ParamSpec, ConcatenatePEP 612, ParamSpec, Concatenate

Status: Open.

#21171 In python/mypy;

· jonathandung opened on Apr 5, 2026

Surprising results from the HTML report

Status: Open.

#21168 In python/mypy;

· wyattscarpenter opened on Apr 4, 2026

mypy does not recognise from ... import inside an IntEnum class body as producing enum members.

feature

topic-enum

topic-runtime-semanticsmypy doesn't model runtime semantics correctlymypy doesn't model runtime semantics correctly

Status: Open.

#21146 In python/mypy;

· peturingi opened on Apr 2, 2026

Emit errors with --disallow-any-generics if type[T] or TypeForm[T] receives a generic T with missing type arguments

feature

Status: Open.

#21145 In python/mypy;

· bzoracler opened on Apr 2, 2026

[1.20 regression] "Unsupported operand types for |" with recursive type definition

bugmypy got something wrongmypy got something wrong

Status: Open.

#21141 In python/mypy;

· latentvoid opened on Apr 1, 2026

python3.14: occasional crashes with mypyc compiled code

bugmypy got something wrongmypy got something wrong

priority-0-high

Status: Open.

#21133 In python/mypy;

· mr-c opened on Apr 1, 2026

Crash on type alias bounded by and defaulted to itself

crash

topic-pep-696TypeVar defaultsTypeVar defaults

topic-recursive-types

Status: Open.

#21128 In python/mypy;

· MeGaGiGaGon opened on Apr 1, 2026

NotImplementedError crash on mutually recursive TypeVarTuple type aliases

crash

topic-pep-646PEP 646 (TypeVarTuple, Unpack)PEP 646 (TypeVarTuple, Unpack)

topic-recursive-types

Status: Open.

#21125 In python/mypy;

· MeGaGiGaGon opened on Apr 1, 2026

RecursionError with recursive type alias and concatenate

crash

topic-paramspecPEP 612, ParamSpec, ConcatenatePEP 612, ParamSpec, Concatenate

topic-recursive-types

Status: Open.

#21123 In python/mypy;

· MeGaGiGaGon opened on Apr 1, 2026