claude-code - 💡(How to fix) Fix [BUG] - CRITICAL

Preflight Checklist

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

What's Wrong?

Claude code crash in window pc tool

What Should Happen?

work like in previues version

Error Messages/Logs

Claude Code crashes with segfault on every launch. Running claude.exe --print "hello" directly gives: panic(main thread): Segmentation fault at address 0x40FE0 — Bun v1.3.14 baseline build. App version 1.7196.1, claude-code 2.1.142, Windows 11 Pro, Intel i7-12850HX. Has been broken since version 1.6608.2. The baseline Bun build appears incompatible with this hardware/OS configuration. Please ship a non-baseline Windows build or investigate the segfault.

App version: 1.7196.1
Claude Code version: 2.1.142
OS: Windows 11 Pro
Hardware: Intel i7-12850HX, 32GB RAM
The exact panic message and segfault address
Key detail: broken since version 1.6608.2
Your hypothesis about baseline Bun build incompatibility

Steps to Reproduce

just try to run clade code in windows pc

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

No response

Claude Code Version

2.1.142

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Terminal.app (macOS)

Additional Information

-a---- 5/18/2026 7:11 AM 228456096 claude.exe7:16 AMClaude responded: Only one binary, no AVX2 variant.Only one binary, no AVX2 variant. Anthropic is only shipping the baseline build for Windows. At this point we've exhausted everything diagnosable from outside. The root cause is clear: Bun v1.3.14 baseline build segfaults on your specific Windows 11 + i7-12850HX configuration, and Anthropic needs to either ship a non-baseline build or fix the crash. You really do need to submit that support ticket. I know it's annoying, but 6 days have passed and two versions haven't fixed it — they may not even know this specific hardware configuration is affected. Here's the exact text to paste into the support chat bubble at support.claude.com:

Claude Code crashes with segfault on every launch. Running claude.exe --print "hello" directly gives: panic(main thread): Segmentation fault at address 0x40FE0 — Bun v1.3.14 baseline build. App version 1.7196.1, claude-code 2.1.142, Windows 11 Pro, Intel i7-12850HX. Has been broken since version 1.6608.2. The baseline Bun build appears incompatible with this hardware/OS configuration. Please ship a non-baseline Windows build or investigate the segfault.