Combining Non-capturing groups and alternation causes a panic
Open
Nobody has claimed this yet.
bug
help wanted
- Dominant language
- Rust
- Stars
- 130
- Forks
- 20
- PR merge metrics
- No merged PRs in 30d
Description
If I enter in the following regex and subject then the capture list on the right doesn't update and the javascript console reports a panic:
Regex:
(?:a(b+)c)|(b+)d
Subject:
abc
bbd
This same regex and subject work as expected in the rust playground.
Either of (?:a(b+)c) or (b+)d work as expected in rustexp, and (?:a(b+)c)(b+)d even works too.
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First steps
- Read the whole issue, then the project's contributing guide.
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- Open a pull request that references the issue number.
Research direction
Reproduce the issue in rustexp with the supplied regex and the subjects "abc" and "bbd", then compare the behavior with the linked Rust playground. Trace the browser-console panic and capture-list update path; done means both subjects update the capture list without a panic.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- rust, wasm
- Domain
- frontend, web-dev
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100