fix: fix "parser seems stuck" panic when parsing colossal files #13794
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Outdated suggestions cannot be applied.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.
The parser step count is incremented every time the parser inspects a token. It's purpose is to ensure the parser doesn't get stuck in infinite loops. But since
self.pos
grows monotonically when parsing source code, it gives a better idea for whether the parser is stuck or not: ifself.pos
is changed, we know that the parser cannot be stuck, so it is safe to reset the step count to 0. This makes the limit check scale with the size of the file, and so should fix #13788.