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Significant Performance Regression in 1.1.405+

bugSomething isn't workingSomething isn't working

Status: Open.

#11359 In microsoft/pyright;

· arranf opened on Apr 2, 2026

"Arguments for ParamSpec are missing" error

bugSomething isn't workingSomething isn't working

Status: Open.

#11358 In microsoft/pyright;

· srittau opened on Apr 2, 2026

StrEnum not recognized as a string by dictionary update

bugSomething isn't workingSomething isn't working

Status: Open.

#11354 In microsoft/pyright;

· acampove opened on Mar 29, 2026

False positive reportCallIssue for generic constructor call using inferred private instance attribute

Status: Open.

#11356 In microsoft/pyright;

· Erlonealpha opened on Mar 28, 2026

Type ignore comments with ty-namespaced codes are not recognized as blanket type ignores

bugSomething isn't workingSomething isn't working

Status: Open.

#11345 In microsoft/pyright;

· correctmost opened on Mar 25, 2026

Feature Request: Type-narrowing of a list item for an inline list multiplied with a type-guard on said item

enhancement requestNew feature or requestNew feature or request

Status: Open.

#11344 In microsoft/pyright;

· Avasam opened on Mar 24, 2026

A specific enum can lead to errors in inferring tuples

Status: Open.

#11339 In microsoft/pyright;

· op200 opened on Mar 20, 2026

Incorrect overload parameter mismatch when typing decorator

bugSomething isn't workingSomething isn't working

Status: Open.

#11333 In microsoft/pyright;

· max-kamps opened on Mar 16, 2026

Cannot resolve TypeDict into Union *only* when the Union contains an Awaitable

bugSomething isn't workingSomething isn't working

Status: Open.

#11324 In microsoft/pyright;

· iwahbe opened on Mar 11, 2026

Regression in 1.1.405 involving loops

bugSomething isn't workingSomething isn't working

Status: Open.

#11321 In microsoft/pyright;

· Molkree opened on Mar 10, 2026

--project as a directory should ignore pyproject.toml without tool.pyright

addressed in next versionIssue is fixed and will appear in next published versionIssue is fixed and will appear in next published version

enhancement requestNew feature or requestNew feature or request

Status: Open.

#11320 In microsoft/pyright;

· thejcannon opened on Mar 10, 2026

Recursive TypeAlias expansion causes non-terminating single-core CPU saturation

Status: Open.

#11316 In microsoft/pyright;

· caomingpei opened on Mar 6, 2026