Issues

• reportUninitializedInstanceVariable reports the KW_ONLY pseudo-field of an abstract dataclass base in a @final subclass

  microsoft/pyright#11938 · Filter by author alex-raw opened on Oct 26, 2026

• Regression: false negative of reportArgumentType in decorated functions

  bug
  microsoft/pyright#11937 · Filter by author pinterior opened on Oct 26, 2026
  1

• FYI: pyright-play.net is currently down

  bug
  microsoft/pyright#11928 · Filter by author finite-state-machine opened on Oct 25, 2026
  2

• Reversed sys.version_info comparison (tuple on the left) is not evaluated as a static condition.

  bug
  microsoft/pyright#11927 · Filter by author hunterhogan opened on Oct 25, 2026

• Workspace diagnostic mode never finishes ("1 file to analyze") when targeting Python 3.14 because string/templatelib.pyi is counted

  addressed in next versionbug
  microsoft/pyright#11925 · Filter by author Kiyahj81 opened on Oct 24, 2026
  1

• Bogus errors when mixing Concatenate with overloaded functions.

  bug
  microsoft/pyright#11922 · Filter by author TheDreadedAndy opened on Oct 23, 2026
  1

• Field types in the functional form of NamedTuple are not validated as type expressions

  bug
  microsoft/pyright#11920 · Filter by author seunghyun-24 opened on Oct 23, 2026
  1

• Diagnostics dropped after a for loop with assert k in d, k (incomplete type stuck in code flow cache, regression in 1.1.364)

  microsoft/pyright#11919 · Filter by author ZmeiGorynych opened on Oct 23, 2026

• --verifytypes should allow setting an attribute based on a fully defined function

  bug
  microsoft/pyright#11917 · Filter by author A5rocks opened on Oct 23, 2026
  1

• Distinguish argument name error from argument type error in callback.

  enhancement request
  microsoft/pyright#11902 · Filter by author nicolasdespres opened on Oct 21, 2026

• reportUnusedExcept produces false positives due to default arguments

  bug
  microsoft/pyright#11899 · Filter by author interrupt-routine opened on Oct 20, 2026

• Wrong sentinel inference with custom repr

  bug
  microsoft/pyright#11893 · Filter by author Simon-Brandt opened on Oct 19, 2026

• reportUndefinedVariable inconsistently reported between python 3.13 and 3.14

  bug
  microsoft/pyright#11890 · Filter by author ydirson opened on Oct 17, 2026
  1

• 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

  addressed in next versionbug
  microsoft/pyright#11882 · Filter by author jhominal opened on Oct 15, 2026
  3

• 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