Issues

• False positive uninitialized-instance-variable for argparse.Namespace subclasses

  typechecking
  meta/pyrefly#5554 · Filter by author Ravencentric opened on Nov 5, 2026

• [v1.5 regression] An unknown class base causes a false unreachable-case warning

  pytorchtypechecking
  Bug

  meta/pyrefly#5549 · Filter by author rchen152 opened on Nov 5, 2026 · 1.5

• [v1.5 regression] Invalid context-manager use goes unchecked

  typechecking
  Bug

  meta/pyrefly#5548 · Filter by author rchen152 opened on Nov 5, 2026 · 1.5

• [v1.5 regression] Negative issubclass narrowing widens Never to object

  narrowingtypechecking
  Bug

  meta/pyrefly#5547 · Filter by author rchen152 opened on Nov 5, 2026 · 1.5

• [v1.5 regression] Repeating a type guard condition causes the guard to be lost

  typechecking
  Bug

  meta/pyrefly#5546 · Filter by author rchen152 opened on Nov 5, 2026 · 1.5

• [v1.5 regression] Pydantic NewType fields reject their base type

  pydantictypechecking
  Bug

  meta/pyrefly#5545 · Filter by author rchen152 opened on Nov 5, 2026 · 1.5

• [v1.5 regression] Narrowing adds | None to unknown type

  narrowingtypechecking
  Bug

  meta/pyrefly#5544 · Filter by author rchen152 opened on Nov 5, 2026 · 1.5

• [v1.5 regression] Pyrefly rejects valid Pydantic nested-model inputs

  pydantictypechecking
  Bug

  meta/pyrefly#5543 · Filter by author rchen152 opened on Nov 5, 2026 · 1.5

• [v1.5 regression] Unknown-length *args treated as an extra argument

  typechecking
  Bug

  meta/pyrefly#5542 · Filter by author rchen152 opened on Nov 5, 2026 · 1.5
  2

  

• [v1.5 regression] False-positive "doesn't support format specifiers" errors

  djangopytorchtypechecking
  Bug

  meta/pyrefly#5541 · Filter by author rchen152 opened on Nov 5, 2026 · 1.5
  1

• [v1.5 regression] 15% slowdown on pytorch from 1.4.0 -> 1.5.0-dev1

  performancepytorch
  Bug

  meta/pyrefly#5539 · Filter by author rchen152 opened on Nov 5, 2026 · 1.5

• Renaming broken with dataclasses and pydantic models

  language-serverpydantic
  Bug

  meta/pyrefly#5538 · Filter by author acampove opened on Nov 5, 2026

• bad-argument-type - false negative when calling decorator function with wrong type

  typechecking
  Bug

  meta/pyrefly#5536 · Filter by author DetachHead opened on Nov 5, 2026
  3

  

• Behaviour difference when virtualenv outside project

  configuration
  Bug

  meta/pyrefly#5533 · Filter by author PeterJCLaw opened on Nov 4, 2026

• Django: type arguments of Field subclasses are ignored

  django
  Bug

  meta/pyrefly#5532 · Filter by author sk- opened on Nov 4, 2026

• Completion returns no items inside a function body when the typed text is a keyword (as, in, is, ...)

  language-server
  Bug

  meta/pyrefly#5529 · Filter by author PetrGolubev opened on Nov 4, 2026

• mypy_primer comments should hide the previous comment

  Task

  meta/pyrefly#5527 · Filter by author DetachHead opened on Nov 4, 2026
  2

  

• Annotated dict union rejects literal keys despite constructing a fresh dictionary

  contextual-typing
  Bug

  meta/pyrefly#5526 · Filter by author zshuzh opened on Nov 4, 2026
  1

  

• improve reStructuredText support

  has-open-prhelp wantedlanguage-server
  Feature

  meta/pyrefly#5520 · Filter by author asukaminato0721 opened on Nov 4, 2026
  1

• subclassing property doesn't work

  typechecking
  Bug

  meta/pyrefly#5519 · Filter by author DetachHead opened on Nov 4, 2026

• support google style docstrings

  help wantedlanguage-server
  Feature

  meta/pyrefly#5518 · Filter by author asukaminato0721 opened on Nov 4, 2026
  1

• Report unreachable duplicate partial-class match cases

  narrowingscoping-control-flowtypechecking
  Feature

  meta/pyrefly#5516 · Filter by author bniladridas opened on Nov 4, 2026
  1

• auto be shown with an inlay

  language-server
  Feature

  meta/pyrefly#5512 · Filter by author asukaminato0721 opened on Nov 3, 2026
  2

• Enum members should be constant not variable

  language-server
  Bug

  meta/pyrefly#5511 · Filter by author asukaminato0721 opened on Nov 3, 2026

• automatically convert a regular string to f string when you type a curly bracket inside a string

  language-server
  Feature

  meta/pyrefly#5510 · Filter by author asukaminato0721 opened on Nov 3, 2026