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Deno v2.5.4stable Released Oct 09, 2025
Impact Score: 5/10

Deno v2.5.4 — Release Notes & Engineering Impact

Source available — automated, not human-reviewed

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

Analysis updated: 2026-11-01.

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

Deno v2.5.4. Source highlight: fix(cache): don't try to set up node_modules with node_modules_dir manual in

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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.

🔧 Bug Fixes & Patches (6)

  • fix(cache): don't try to set up node_modules with node_modules_dir manual in
  • fix(cli): jsx pragma-related swc panics (#30935)
  • fix(ext/node): `fs.cp` and `fs.cpSync` compatibility (#30502)
  • fix(ext/node): `fs.stat` and `fs.statSync` compatibility (#30866)
  • fix(ext/node): avoid stack overflow in `node:zlib`'s `gunzip` (#30865)
  • fix(ext/node): fs.realpath buffer encoding (#30885)
📄 View Raw Release Notes (Original Developer Log)
### 2.5.4 / 2025.10.09 - fix(cache): don't try to set up node_modules with node_modules_dir manual in deno cache (#30957) - fix(cli): jsx pragma-related swc panics (#30935) - fix(ext/node): `fs.cp` and `fs.cpSync` compatibility (#30502) - fix(ext/node): `fs.stat` and `fs.statSync` compatibility (#30866) - fix(ext/node): avoid stack overflow in `node:zlib`'s `gunzip` (#30865) - fix(ext/node): fs.realpath buffer encoding (#30885) - fix(ext/node): inspect X509Certificate class (#30882) - fix(ext/node): map BadResource error to the corresponding node error (#30926) - fix(ext/node): omit `smi` from `zlib.crc32` op function (#30907) - fix(tunnel): prevent auth subprocess loop with tasks (#30896) - fix(tunnel): unhide --tunnel flag (#30940) - fix(update): preserve tilde in version range (#30946) - fix(webgpu): crash after isolate disposal (#30909) - fix: use ArrayIsArray primordial (#30927)
← Older Version Deno v2.5.3