Issues

• reportUndefinedVariable inconsistently reported between python 3.13 and 3.14

  bug
  microsoft/pyright#11890 · Filter by author ydirson opened on Oct 17, 2026

• Find references, rename, incoming calls and workspace symbols miss unopened files right after server start

  microsoft/pyright#11884 · Filter by author AdzerKI opened on Oct 15, 2026

• typing-extensions's sentinel (all lowercase) is not recognized

  bug
  microsoft/pyright#11882 · Filter by author jhominal opened on Oct 15, 2026
  1

• yield from on a union of classes with __iter__ evaluates to Unknown

  microsoft/pyright#11881 · Filter by author AlvinKuruvilla opened on Oct 15, 2026

• Unpack Parameter does not work with functools.partial

  bug
  microsoft/pyright#11879 · Filter by author lovetox opened on Oct 14, 2026

• False positive: Unpack operation not allowed in comprehension

  bug
  microsoft/pyright#11876 · Filter by author attilaolah opened on Oct 14, 2026

• Failed overload with union-of-Sequence parameter rejects later matching overloads

  microsoft/pyright#11868 · Filter by author jorenham opened on Oct 13, 2026

• TypedDict assignability: NotRequired source key accepted for a Required ReadOnly target key

  bug
  microsoft/pyright#11859 · Filter by author seunghyun-24 opened on Oct 11, 2026
  1

• No error on missing method in Protocol subclass

  bug
  microsoft/pyright#11858 · Filter by author parthkalgaonkar opened on Oct 10, 2026
  1

• __builtins__.pyi with local import * doesn't work as expected with 1.1.414

  bug
  microsoft/pyright#11855 · Filter by author Azureblade3808 opened on Oct 10, 2026

• TypedDict subtyping : ReadOnly required incorrectly accepts NotRequired source key

  bug
  microsoft/pyright#11851 · Filter by author Pika-pikachu30 opened on Oct 9, 2026
  1

• Adding an out-of-bound type to a union in a contravariant position makes Pyright infer a narrower type

  bug
  microsoft/pyright#11846 · Filter by author nickshirobokov opened on Oct 8, 2026

• Unable to correctly identify the generator

  bug
  microsoft/pyright#11841 · Filter by author op200 opened on Oct 7, 2026

• Overloaded override stops being checked at an added overload

  bug
  microsoft/pyright#11836 · Filter by author dlech opened on Oct 5, 2026

• Property in a PEP 695 generic class is reported as redeclared when its type is an alias that refers back to the class

  bug
  microsoft/pyright#11835 · Filter by author dlech opened on Oct 5, 2026
  4

• False "Data protocols are not allowed in issubclass calls" error for protocols that declare __slots__, such as SupportsInt and collections.abc.Buffer

  bug
  microsoft/pyright#11834 · Filter by author dlech opened on Oct 5, 2026
  1

• Lambda assigned through a property setter typed as a Callable loses its first parameter

  bug
  microsoft/pyright#11833 · Filter by author dlech opened on Oct 5, 2026

• Infer Literal types for uppercase constants assigned literal values

  enhancement request
  microsoft/pyright#11832 · Filter by author VSCGit-Windows opened on Oct 3, 2026

• Support __bool__ = None declaration for invalid conditional operands

  enhancement request
  microsoft/pyright#11825 · Filter by author TomiBelan opened on Oct 2, 2026
  1

• Identity aliases not handled properly

  bug
  microsoft/pyright#11813 · Filter by author Moussa-Mikhail opened on Oct 1, 2026

• False positive when union type is asserted to one type

  bug
  microsoft/pyright#11812 · Filter by author giommaso opened on Oct 1, 2026
  3

• __getattribute__ return type is not reflected in the type of attributes

  bug
  microsoft/pyright#11811 · Filter by author multimeric opened on Oct 1, 2026
  4

• Circular TypeAliasTypes are not understood in TypedDict & NamedTuple

  bug
  microsoft/pyright#11810 · Filter by author dangotbanned opened on Sep 30, 2026

• pyright --verifytypes doesn't see docstring if docstring is placed within base clas

  bug
  microsoft/pyright#11803 · Filter by author CheViana opened on Sep 27, 2026
  1

  

• Narrowing IO[str] | None with sys.stdout is still considered possibly None

  as designed
  microsoft/pyright#11768 · Filter by author nedbat opened on Sep 15, 2026
  5