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Bun bun-v0.4.0stable Released Dec 23, 2022
Impact Score: 5/10

Bun v0.4.0

Source available — automated, not human-reviewed

Component: bun · Channel: stable. Automated analysis, not a compatibility certification. How this works.

Analysis updated: 2026-11-01.

Compatibility not verified — check source notes
📄 .MD
✨ Features 5 🔧 Bug Fixes 6
⚡ Executive Summary (TL;DR)

Bun bun-v0.4.0. Source highlight: curl https://bun.sh/install | bash

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Who Does This Impact? (Role-Based Analysis)

💻 Software Engineers & Devs

Check the source notes against the package and APIs you use before upgrading.

📊 Product & Engineering Leads

Use the documented changes to assess relevance to your product; release frequency alone is not a quality measure.

⚙️ DevOps & Security

Verify the target version, runtime requirements and rollback procedure in the official documentation.

✨ New Features & Capabilities (5)

  • chore: add eslintcache
  • Add filename completions on `bun` command to Zsh
  • add `bun pm ls` for printing lockfiles
  • add tests for `process.stdin`
  • add tests for #1633

🔧 Bug Fixes & Patches (6)

  • fix `__require` collision from linking
  • fix path string
  • fix(stream): Fix Readable.pipe()
  • fix(stream): make Readable.read work w/o \_construct implemented
  • Fix typo in bun.d.ts
  • bug compatible with `stdin.on("readable")`
📄 View Raw Release Notes (Original Developer Log)
To install: ```bash curl https://bun.sh/install | bash ``` To upgrade: ```bash bun upgrade ``` **[Read Bun v0.4.0's release notes on Bun's blog](https://bun.sh/blog/bun-v0.4.0)** <a href="https://bun.sh/blog/bun-v0.4.0"><img src="https://user-images.githubusercontent.com/3238291/209300634-79333724-1bbc-4c80-a811-23d6e1ff6373.gif" width=600 /></a> ## Commit log - fix `__require` collision from linking by @dylan-conway in https://github.com/oven-sh/bun/pull/1585 - chore: add eslintcache by @Simon-He95 in https://github.com/oven-sh/bun/pull/1586 - Add filename completions on `bun` command to Zsh by @colinhacks in https://github.com/oven-sh/bun/pull/1593 - Exclude additional TSdeclaration file extensions from completions by @colinhacks in https://github.com/oven-sh/bun/pull/1596 - fix path string by @YUxiangLuo in https://github.com/oven-sh/bun/pull/1597 - override `process.stdin.on()` correctly by @alexlamsl in https://github.com/oven-sh/bun/pull/1603 - fix(stream): Fix Readable.pipe() by @ThatOneBro in https://github.com/oven-sh/bun/pull/1606 - make `process.stdin` work under TTY by @alexlamsl in https://github.com/oven-sh/bun/pull/1611 - add `bun pm ls` for printing lockfiles by @dylan-conway in https://github.com/oven-sh/bun/pull/1612 - fix(stream): make Readable.read work w/o \_construct implemented by @ThatOneBro in https://github.com/oven-sh/bun/pull/1613 - Fix typo in bun.d.ts by @eltociear in https://github.com/oven-sh/bun/pull/1619 - add tests for `process.stdin` by @alexlamsl in https://github.com/oven-sh/bun/pull/1621 - docs(README.md): update bun-types new path definition by @hoseinprd in https://github.com/oven-sh/bun/pull/1622 - Delete Oniguruma by @Jarred-Sumner in https://github.com/oven-sh/bun/pull/1625 - bug compatible with `stdin.on("readable")` by @alexlamsl in https://github.com/oven-sh/bun/pull/1626 - Implement `bunx` by @Jarred-Sumner in https://github.com/oven-sh/bun/pull/1634 - add tests for #1633 by @alexlamsl in https://github.com/oven-sh/bun/pull/1635 - fix jest hooks in bun-test by @ethanburrell in https://github.com/oven-sh/bun/pull/1639 - fix `bun install` dependency resolution by @alexlamsl in https://github.com/oven-sh/bun/pull/1643 - [install] avoid dependency conflicts between siblings by @alexlamsl in https://github.com/oven-sh/bun/pull/1647 - Update benchmarks by @colinhacks in https://github.com/oven-sh/bun/pull/1648 - [install] fix remaining corner cases with dependency resolution by @alexlamsl in https://github.com/oven-sh/bun/pull/1649 ## New Contributors * @Simon-He95 made their first contribution in https://github.com/oven-sh/bun/pull/1586 * @YUxiangLuo made their first contribution in https://github.com/oven-sh/bun/pull/1597 * @alexlamsl made their first contribution in https://github.com/oven-sh/bun/pull/1603 * @hoseinprd made their first contribution in https://github.com/oven-sh/bun/pull/1622 * @ethanburrell made their first contribution in https://github.com/oven-sh/bun/pull/1639 **Full Changelog**: https://github.com/oven-sh/bun/compare/bun-v0.3.0...bun-v0.4.0
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