Issues · python/mypy · GitHub

Announcement issue for plugin API changes
#6617 · msullivan opened on Apr 3, 2019
24

Labels Milestones New issue

[1.20 regression] no longer accepts the empty tuple for `except ...:`

#21152

· TTsangSC opened

on Apr 2, 2026

[1.20 regression] loss of type inference of chained-comparison operands

#21149

· TTsangSC opened

on Apr 2, 2026

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

topic-runtime-semantics

#21146

· 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

#21145

· bzoracler opened

on Apr 2, 2026

[1.20 regression] incorrect reachability for comparisons between set and frozenset

#21143

· hauntsaninja opened

on Apr 1, 2026

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

#21141

· latentvoid opened

on Apr 1, 2026

python3.14: occasional crashes with mypyc compiled code

priority-0-high

#21133

· mr-c opened

on Apr 1, 2026

Crash on type alias bounded by and defaulted to itself

topic-recursive-types

#21128

· MeGaGiGaGon opened

on Apr 1, 2026

`NotImplementedError` crash on mutually recursive `TypeVarTuple` type aliases

topic-recursive-types

#21125

· MeGaGiGaGon opened

on Apr 1, 2026

`RecursionError` with recursive type alias and concatenate

topic-paramspec

topic-recursive-types

#21123

· MeGaGiGaGon opened

on Apr 1, 2026

`testAllBase64Features_librt` fails with Python 3.14.4

#21120

· mr-c opened

on Mar 31, 2026

Interaction between an `enum` alias and `assert_never()` seems to fail

topic-type-narrowing

#21117

· jhbuhrman opened

on Mar 31, 2026