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Deno v0.3.9stable Released Apr 25, 2019
Impact Score: 5/10

Deno v0.3.9 — 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
✨ Features 6 🔧 Bug Fixes 3
⚡ Executive Summary (TL;DR)

Deno v0.3.9. Source highlight: Fix #2033, shared queue push bug (#2158)

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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 (6)

  • Add Deno.kill(pid, signo) and process.kill(signo) (Unix only) (#2177)
  • http: add cookie module (denoland/deno_std#338)
  • fs: add getFileInfoType() (denoland/deno_std#341)
  • fs: add ensureLink/ensureLinkSync (denoland/deno_std#353)
  • fs: add ensureSymlink/ensureSymlinkSync (denoland/deno_std#268)
  • fs: add readFileStr, writeFileStr (denoland/deno_std#276, denoland/deno_std#340)

🔧 Bug Fixes & Patches (3)

  • Fix #2033, shared queue push bug (#2158)
  • Fix panic handler (#2188)
  • core: make Isolate concrete, remove Dispatch trait (#2183)
📄 View Raw Release Notes (Original Developer Log)
### Changes In deno: - Fix #2033, shared queue push bug (#2158) - Fix panic handler (#2188) - cli: Change "deno --types" to "deno types" and "deno --prefetch" to "deno prefetch" (#2157) - Make Deno/Deno.core not deletable/writable (#2153) - Add Deno.kill(pid, signo) and process.kill(signo) (Unix only) (#2177) - symlink: Ignore type parameter on non-Windows platforms (#2185) - upgrade rust crates (#2186) - core: make Isolate concrete, remove Dispatch trait (#2183) In deno_std: - http: add cookie module (denoland/deno_std#338) - fs: add getFileInfoType() (denoland/deno_std#341) - fs: add ensureLink/ensureLinkSync (denoland/deno_std#353) - fs: add ensureSymlink/ensureSymlinkSync (denoland/deno_std#268) - fs: add readFileStr, writeFileStr (denoland/deno_std#276, denoland/deno_std#340) - testing: support Sets in asserts.equals (denoland/deno_std#350) ### Install or Upgrade Shell: ```sh curl -fsSL https://deno.land/x/install/install.sh | sh -s v0.3.9 ``` With PowerShell: ```powershell iwr https://deno.land/x/install/install.ps1 -useb -outf install.ps1; .\install.ps1 v0.3.9 ```
← Older Version Deno v0.3.8