[BUG] Claude Code 2.1.15 wont start: error: Invalid DNS result order.

Resolved 💬 4 comments Opened Jan 22, 2026 by hucky8 Closed Jan 22, 2026

Preflight Checklist

  • [x] I have searched existing issues and this hasn't been reported yet
  • [x] This is a single bug report (please file separate reports for different bugs)
  • [x] I am using the latest version of Claude Code

What's Wrong?

I upgraded on my M1 Mac with brew upgrade claude-code as usually, but claude code does not start anymore. Claude /doctor does not work

What Should Happen?

Claude should start and it should start to prompt

Error Messages/Logs

Freakbook4:mvp user$ claude
warn: CPU lacks AVX support, strange crashes may occur. Reinstall Bun or use *-baseline build:
  https://github.com/oven-sh/bun/releases/download/bun-v1.3.6/bun-darwin-x64-baseline.zip
error: Invalid DNS result order.

Steps to Reproduce

Install / update Claude code on mac via Homebrew: brew upgrade claude-code
node version: v25.4.0

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

2.1.12

Claude Code Version

2.1.15

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_

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