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Casting list of union type to list[Base]

Status: Open.

#2141 In facebook/pyrefly;

· praskr-wisdom opened on Jan 17, 2026

Python Autocompletion for Polars/Pandas Data Frame Column names is not working correctly and is very buggy

Status: Open.

#2139 In facebook/pyrefly;

· PGupta-Git opened on Jan 17, 2026

Possible false positive no-matching-overload

Status: Open.

#2138 In facebook/pyrefly;

· warsaw opened on Jan 16, 2026

Bad Type Variable resolution with outer context (dict.get)

contextual-typingissues related to contextual typingissues related to contextual typing

typechecking

Status: Open.

Bug

#2136 In facebook/pyrefly;

· randolf-scholz opened on Jan 16, 2026

Pyrefly incorrectly rejects Protocol with descriptor attributes

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.

Bug

#2135 In facebook/pyrefly;

· praskr-wisdom opened on Jan 16, 2026

Can Pyrefly Infer generate stub files?

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

inferof or related to pyre inferof or related to pyre infer

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

#2133 In facebook/pyrefly;

· QEDady opened on Jan 16, 2026

pyrefly check takes long time to check

performance

questionFurther information is requestedFurther information is requested

typechecking

Status: Open.

#2132 In facebook/pyrefly;

· AgentCosmic opened on Jan 16, 2026

Make sure <code>Variable::Quantified</code>s are always finished

typechecking

Status: Open.

Task

#2131 In facebook/pyrefly;

· rchen152 opened on Jan 16, 2026

Pyrefly can't infer generic return type when the type argument is a union of scoped type parameters

typechecking

Status: Open.

Bug

#2130 In facebook/pyrefly;

· rchen152 opened on Jan 16, 2026

Regex patterns with concatenated raw strings are inferred as Pattern[LiteralString] instead of Pattern[str]

Status: Open.

#2129 In facebook/pyrefly;

· correctmost opened on Jan 16, 2026

Wrong unused-import warning when it's only referenced in __all__

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

Status: Open.

Bug

#2128 In facebook/pyrefly;

· maldoinc opened on Jan 16, 2026

<code>includeDeclaration</code> is not respected when enumerating references

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

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

Status: Open.

Feature

#2126 In facebook/pyrefly;

· acooper-akamai opened on Jan 15, 2026