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support analyzing duplicates

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.

Feature

#2066 In facebook/pyrefly;

· asukaminato0721 opened on Jan 11, 2026

Dataclass descriptors conformance tests may block correctness

typechecking

Status: Open.

#2065 In facebook/pyrefly;

· stroxler opened on Jan 11, 2026

Incorrect inference with custom class and <code>and</code>

typechecking

Status: Open.

Bug

#2064 In facebook/pyrefly;

· aorenste opened on Jan 11, 2026

A generic type argument accepts a tuple

typechecking

Status: Open.

Bug

#2063 In facebook/pyrefly;

· hyperkai opened on Jan 11, 2026

False positive in ipaddress._BaseNetwork.subnet_of

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.

#2062 In facebook/pyrefly;

· yangdanny97 opened on Jan 11, 2026

Support custom logging levels in logger stdlib package

typechecking

Status: Open.

Bug

#2061 In facebook/pyrefly;

· yangdanny97 opened on Jan 11, 2026

negative narrowing not applied for <code>None</code> in match case

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

Status: Open.

Bug

#2058 In facebook/pyrefly;

· yangdanny97 opened on Jan 10, 2026

False negatives in uninitialized local detection for branches that end in function calls (due to unknown Never/NoReturn status)

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

typechecking

Status: Open.

Bug

#2055 In facebook/pyrefly;

· stroxler opened on Jan 9, 2026

marshmallow: Schema.Meta class pattern causes false positive bad-override errors

typechecking

Status: Open.

#2054 In facebook/pyrefly;

· bristena-op opened on Jan 9, 2026

attrs: underscore stripping for private attributes not recognized in __init__

typechecking

Status: Open.

#2053 In facebook/pyrefly;

· bristena-op opened on Jan 9, 2026

Support Django's aggregations with output_field

django

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

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.

Feature

#2052 In facebook/pyrefly;

· MartinBernstorff opened on Jan 9, 2026

'Go to symbol' excludes methods inside a class

good first issueGood for newcomersGood for newcomers

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

Status: Open.

Bug

#2051 In facebook/pyrefly;

· dempstert opened on Jan 9, 2026