Issues

• bug(stubgen): typing / _typeshed imports are emitted above from __future__ import annotations

  stubgen
  facebook/pyrefly#5321 · Filter by author ryanking opened on Oct 21, 2026
  1

• bug(stubgen): annotated self.x: T attributes get the inferred type, often Incomplete

  stubgen
  facebook/pyrefly#5320 · Filter by author ryanking opened on Oct 21, 2026

• bug(stubgen): synthesized Pydantic __init__ uses lax-mode types (LaxStr, Decimal | ...) and Incomplete

  pydanticstubgen
  facebook/pyrefly#5319 · Filter by author ryanking opened on Oct 21, 2026

• bug(stubgen): names used only in inferred types are not imported

  stubgen
  facebook/pyrefly#5318 · Filter by author ryanking opened on Oct 21, 2026

• Constrained TypeVar(int, float) is solved to int from the first argument, so a later float argument is rejected

  dataframe
  facebook/pyrefly#5317 · Filter by author Blacksujit opened on Oct 21, 2026

• configuration option to disable the PYTHONPATH warning

  facebook/pyrefly#5315 · Filter by author gdalley-jt opened on Oct 21, 2026

• Support numpydoc

  language-server
  facebook/pyrefly#5313 · Filter by author asukaminato0721 opened on Oct 21, 2026

• Infer code completion of __getattr__

  language-server
  facebook/pyrefly#5312 · Filter by author asukaminato0721 opened on Oct 21, 2026

• panic: key lacking binding with Key::Definition

  crash
  facebook/pyrefly#5311 · Filter by author correctmost opened on Oct 21, 2026
  

• pyrefly suddenly crashes typeshed CI because of missing EllipsisType

  crash
  facebook/pyrefly#5308 · Filter by author srittau opened on Oct 21, 2026
  2

• announcing-tsp is 404

  documentation
  facebook/pyrefly#5307 · Filter by author asukaminato0721 opened on Oct 21, 2026
  1

• generic inference fails when classmethod decorated with descriptor class that uses overloads

  facebook/pyrefly#5303 · Filter by author DetachHead opened on Oct 21, 2026

• False positive missing-attribute (not declared in __slots__) when assigning an attribute through cls

  typechecking
  facebook/pyrefly#5300 · Filter by author gevi34 opened on Oct 20, 2026

• no error when overriding descriptor attribute with a non-descriptor

  facebook/pyrefly#5299 · Filter by author DetachHead opened on Oct 20, 2026

• deprecated - false negative when dectorated function has a decorator that changes its type to a union

  typechecking
  facebook/pyrefly#5298 · Filter by author DetachHead opened on Oct 20, 2026

• Infer complete schema for pandas DataFrame if possible

  dataframe
  facebook/pyrefly#5297 · Filter by author tonyyuyiding opened on Oct 20, 2026

• no error when overriding staticmethod/classmethod with instance method

  facebook/pyrefly#5296 · Filter by author DetachHead opened on Oct 20, 2026
  2

  

• no error when instance method has no self parameter

  facebook/pyrefly#5295 · Filter by author DetachHead opened on Oct 20, 2026

• no error when @classmethod has no cls parameter

  facebook/pyrefly#5294 · Filter by author DetachHead opened on Oct 20, 2026

• support polars in sandbox

  dataframe
  facebook/pyrefly#5293 · Filter by author tonyyuyiding opened on Oct 20, 2026

• frozendict is invariant (python 3.15)

  facebook/pyrefly#5289 · Filter by author IIIMADDINIII opened on Oct 19, 2026
  2

• Tuple unpacking *tuple[Any, ...] inside a subclass of tuple causes all element types to be Unioned (affects the SQLAlchemy Row-type)

  sqlalchemy
  facebook/pyrefly#5286 · Filter by author mazen-isstech opened on Oct 19, 2026

• 1.4.0 release notes name nonexistent unknown-member-type diagnostic

  language-server
  facebook/pyrefly#5284 · Filter by author adamtheturtle opened on Oct 19, 2026
  

• attrs.field(converter=None) makes field type Unknown instead of keeping the annotation

  attrs
  facebook/pyrefly#5283 · Filter by author airglide opened on Oct 19, 2026

• Metaclass attribute becomes unknown after narrowing type[Protocol] with isinstance

  narrowingtypechecking
  facebook/pyrefly#5282 · Filter by author adamtheturtle opened on Oct 19, 2026