# Crystal 1.18.2

- Product: Crystal (https://whatsnew.fyi/product/crystal)
- Vendor: Crystal Language
- Date: 2025-10-21
- Version: 1.18.2
- Original notes: https://github.com/crystal-lang/crystal/releases/tag/1.18.2
- Permalink: https://whatsnew.fyi/product/crystal/releases/1.18.2

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **fixed** — Revert type restriction for IO#read_bytes
- **fixed** — Fix Fiber::ExecutionContext.default_workers_count to avoid taking into account unsupported values

###### Bugfixes

###### stdlib

- _(files)_ **[regression]** Revert type restriction for `IO#read_bytes` ([#16231], thanks @straight-shoota)
- _(runtime)_ Fix `Fiber::ExecutionContext.default_workers_count` to avoid taking into account unsupported values ([#16227], thanks @Sija)

[#16231]: https://github.com/crystal-lang/crystal/pull/16231
[#16227]: https://github.com/crystal-lang/crystal/pull/16227

###### Infrastructure

- Changelog for 1.18.2 ([#16243], thanks @matiasgarciaisaia)

[#16243]: https://github.com/crystal-lang/crystal/pull/16243