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Generic in function argouemnt lambda becomes nullable when outer function returns a nullable value

Status: Open.

#3688 In facebook/pyrefly;

· hrolfurgylfa opened on Jun 4, 2026

Add versioned docs or a visible version indicator to the docs

documentationImprovements or additions to documentationImprovements or additions to documentation

Status: Open.

Feature

#3685 In facebook/pyrefly;

· Alc-Alc opened on Jun 4, 2026

Make sure quick fixes and code actions that insert text have proper line endings

language-serverIssues specific to our IDE integration rather than type checkingIssues specific to our IDE integration rather than type checking

Status: Open.

Task

#3684 In facebook/pyrefly;

· yangdanny97 opened on Jun 4, 2026

new rule - missing super() call

typechecking

Status: Open.

Feature

#3681 In facebook/pyrefly;

· DetachHead opened on Jun 4, 2026

check for overlapping overloads

typechecking

Status: Open.

Feature

#3680 In facebook/pyrefly;

· DetachHead opened on Jun 4, 2026

report an error when __init__ and __new__ signatures are incompatible

typechecking

Status: Open.

Feature

#3679 In facebook/pyrefly;

· DetachHead opened on Jun 4, 2026

option to treat ALL_CAPS variables as Final

typechecking

Status: Open.

Feature

#3678 In facebook/pyrefly;

· DetachHead opened on Jun 4, 2026

report an error on untyped base class

typechecking

Status: Open.

Feature

#3677 In facebook/pyrefly;

· DetachHead opened on Jun 4, 2026

new rule - detect circular dependencies

typechecking

Status: Open.

Feature

#3676 In facebook/pyrefly;

· DetachHead opened on Jun 3, 2026

FN: union of constraints is incorrectly allowed to match constrained TypeVar

typechecking

Status: Open.

Bug

#3673 In facebook/pyrefly;

· rchen152 opened on Jun 3, 2026

Stack overflow in resolve_get_class_attr

crash

help wantedLarger than "good first issue", but still well-defined and ready for someone to pick upLarger than "good first issue", but still well-defined and ready for someone to pick up

Status: Open.

Bug

#3671 In facebook/pyrefly;

· correctmost opened on Jun 3, 2026

panic: key lacking binding with fuzzed assignment expressions and comprehensions

crash

help wantedLarger than "good first issue", but still well-defined and ready for someone to pick upLarger than "good first issue", but still well-defined and ready for someone to pick up

Status: Open.

Bug

#3670 In facebook/pyrefly;

· correctmost opened on Jun 3, 2026