[BUG] Claude Code / Bun AVX-512 Crash

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?

Claude Code (Bun-based) crashes with SIGILL (illegal instruction) on Intel i7-5930K

What Should Happen?

Claude Code (or dependencies) should properly detect available CPU instruction sets.

Error Messages/Logs

Steps to Reproduce

Refer to attached the attached "claude-repo-bun-crashes.tar.gz"

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

1.0.69

Platform

Anthropic API

Operating System

Other Linux

Terminal/Shell

Other

Additional Information

claude-repo-bun-crashes.tar.gz