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Slow performance on 0.56 possibly related to non-convergent-recursiong

performance

Status: Open.

#2783 In facebook/pyrefly;

· stefvanhouten opened on Mar 12, 2026

Add --summary option that shows info without progress bar

Status: Open.

#2780 In facebook/pyrefly;

· oyarsa opened on Mar 11, 2026

Inconsistency between checkers when overriding property w/ regular attribute

needs-discussionAn issue where it's not clear whether there is a bug or we are behaving as expected.An issue where it's not clear whether there is a bug or we are behaving as expected.

typechecking

Status: Open.

#2771 In facebook/pyrefly;

· yangdanny97 opened on Mar 10, 2026

ENH: Opt-in option to show inferred variance in error messages

needs-discussionAn issue where it's not clear whether there is a bug or we are behaving as expected.An issue where it's not clear whether there is a bug or we are behaving as expected.

Status: Open.

#2758 In facebook/pyrefly;

· randolf-scholz opened on Mar 10, 2026

Preliminary support for class decorators

typechecking

usabilityUsability & readiness issues identified with running Pyrefly on top OSS projectsUsability & readiness issues identified with running Pyrefly on top OSS projects

Status: Open.

Feature

#2752 In facebook/pyrefly;

· grievejia opened on Mar 10, 2026

dict ** unpacking does not respect descriptor

needs-discussionAn issue where it's not clear whether there is a bug or we are behaving as expected.An issue where it's not clear whether there is a bug or we are behaving as expected.

typechecking

usabilityUsability & readiness issues identified with running Pyrefly on top OSS projectsUsability & readiness issues identified with running Pyrefly on top OSS projects

Status: Open.

Bug

#2751 In facebook/pyrefly;

· grievejia opened on Mar 10, 2026

Support singleton pattern setting ClassName.attr in __init__

typechecking

usabilityUsability & readiness issues identified with running Pyrefly on top OSS projectsUsability & readiness issues identified with running Pyrefly on top OSS projects

Status: Open.

Feature

#2748 In facebook/pyrefly;

· grievejia opened on Mar 10, 2026

Avoid hard-error on naming-only inconsistent override

typechecking

usabilityUsability & readiness issues identified with running Pyrefly on top OSS projectsUsability & readiness issues identified with running Pyrefly on top OSS projects

Status: Open.

Feature

#2746 In facebook/pyrefly;

· grievejia opened on Mar 10, 2026

in narrowing not working for frozenset created with literal iterable

narrowingIssues with narrowing - root cause is usually narrowing, flow handling, or bothIssues with narrowing - root cause is usually narrowing, flow handling, or both

typechecking

usabilityUsability & readiness issues identified with running Pyrefly on top OSS projectsUsability & readiness issues identified with running Pyrefly on top OSS projects

Status: Open.

Bug

#2744 In facebook/pyrefly;

· grievejia opened on Mar 10, 2026

Bounded type var with covariant Iterator assignment

typechecking

usabilityUsability & readiness issues identified with running Pyrefly on top OSS projectsUsability & readiness issues identified with running Pyrefly on top OSS projects

Status: Open.

Bug

#2742 In facebook/pyrefly;

· grievejia opened on Mar 10, 2026

Enum .value mismatch with union of literals

typechecking

usabilityUsability & readiness issues identified with running Pyrefly on top OSS projectsUsability & readiness issues identified with running Pyrefly on top OSS projects

Status: Open.

Bug

#2741 In facebook/pyrefly;

· grievejia opened on Mar 10, 2026

Closure narrowing loss after reassignment

narrowingIssues with narrowing - root cause is usually narrowing, flow handling, or bothIssues with narrowing - root cause is usually narrowing, flow handling, or both

scoping-control-flowissues related to scoping and control flowissues related to scoping and control flow

typechecking

usabilityUsability & readiness issues identified with running Pyrefly on top OSS projectsUsability & readiness issues identified with running Pyrefly on top OSS projects

Status: Open.

Bug

#2739 In facebook/pyrefly;

· grievejia opened on Mar 10, 2026