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base repository: juliangruber/brace-expansion
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base: v5.0.8
head repository: juliangruber/brace-expansion
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compare: v5.0.9
- 5 commits
- 5 files changed
- 3 contributors
Commits on Jul 24, 2026
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Bump linkify-it from 5.0.1 to 5.0.2 (#128)
Bumps [linkify-it](https://github.com/markdown-it/linkify-it) from 5.0.1 to 5.0.2. - [Changelog](https://github.com/markdown-it/linkify-it/blob/master/CHANGELOG.md) - [Commits](markdown-it/linkify-it@5.0.1...5.0.2) --- updated-dependencies: - dependency-name: linkify-it dependency-version: 5.0.2 dependency-type: indirect ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
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Commits on Jul 27, 2026
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docs: make the maxLength example produce a non-empty result (#137)
* docs: make the maxLength example produce a non-empty result * Update README.md --------- Co-authored-by: Julian Gruber <julian@juliangruber.com>
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Commits on Jul 30, 2026
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* Bound total expansion length across comma alternatives `maxLength` was enforced in `combine`, the one place output grows, but not on the `values` array built to feed it. Each alternative in `{a,b,c,...}` is expanded by its own `expand_` call, so each received a full independent `maxLength` allowance, and the results were concatenated with no running total. With `A` alternatives, `values` could reach `A * maxLength` characters before `combine` ever got the chance to truncate it. A ~25 KB input with 400 alternatives grew `values` past the heap limit and crashed the process with an uncatchable out-of-memory error, bypassing the mitigation added in 5.0.8 for CVE-2026-14257. Track the running result count and character length while appending alternatives, and stop once either bound is reached. * Apply maxLength while generating sequences `expandSequence` was bounded by `max`, the result count, but never consulted `maxLength`. A padded element's width follows the input, so a wide pad made it generate `max` wide elements only for `combine` to discard nearly all of them. Memory stays flat here, since V8 represents those padded strings as cons-strings, which is likely why this path was not caught alongside the memory-exhaustion issue. The cost is time instead, proportional to `max * width`: a ~400 KB input blocked the event loop for over two minutes. Pass `maxLength` into the generation loop and stop once the sequence's own characters reach it. Output is byte-identical; only the discarded work is removed. The same input now returns in ~18 ms. * fix: don't count dropped empties against `max` Capping the intermediate `values` array at `max` entries counted alternatives that `combine` goes on to drop as empty, so `max` stopped bounding the number of *kept* results: `expand('{a,,b}', { max: 2 })` returned `['a']` where it used to return `['a', 'b']`. Skip those values rather than counting them. The cap itself stays - it is what bounds the array when the values are empty and so contribute no characters for `maxLength` to see.Configuration menu - View commit details
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test: cover dropping empties when only some prefixes are empty
The pre-filter added in 688a99e only skips empty alternatives when every accumulated prefix is still empty. Once an earlier group has put a non-empty string into `acc`, that filter switches off and `combine`'s own empty-result check is the only thing dropping the empties the remaining empty prefixes produce. Nothing exercised that path, so branch coverage sat at 98.91% and `npm test` exited 1 on tap's coverage gate even though all tests passed. Cover it with `{a,}{,}` and friends, which bash expands to `a a`.
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