Reject multiple starred names in sequence patterns - #25976
Merged
charliermarsh merged 2 commits intoJun 14, 2026
Conversation
Memory usage reportMemory usage unchanged ✅ |
|
|
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Summary
Python permits at most one starred name in a sequence pattern, but our parser currently accepts multiple:
This tracks whether a sequence pattern already contains a star and reports
invalid-syntaxon each later starred name. The diagnostic points to the additional starred pattern and uses CPython's error message, while keeping the recovered AST available to downstream tools.