Chrome native host crashes on Windows with Bun 1.3.5 - Internal assertion failure

Description

The Chrome native host crashes immediately on Windows when trying to use the /chrome command to connect to the Claude in Chrome extension.

Environment

• OS: Windows 11
• Claude Code version: 2.1.20
• Bun version: 1.3.5
• Chrome extension ID: fcoeoabgfenejglbffodgkkbkcdhcgfn (official Claude in Chrome)

Steps to Reproduce

1. Install Claude Code on Windows
2. Install the Claude in Chrome extension
3. Run claude and use /chrome command
4. Or manually run: claude.exe --chrome-native-host

Error Output

[Claude Chrome Native Host] Initializing...
[Claude Chrome Native Host] Creating socket listener: \.\pipe\claude-mcp-browser-bridge-AdminRemote
============================================================
Bun v1.3.5 (1e86cebd) Windows x64 (baseline)
Windows v.win11_dt
CPU: sse42 avx avx2 avx512

panic(main thread): Internal assertion failure
oh no: Bun has crashed. This indicates a bug in Bun, not your code.

Crash Report

https://bun.report/1.3.5/e_11e86cebEugggC++08F+mvBoxhkf0389e__0shkwCA0eNrzzCtJLcpLzM9TSEvMzCktSgUAiSkKPg

Configuration Files

The native messaging host is correctly configured:

Registry: HKCU\Software\Google\Chrome\NativeMessagingHosts\com.anthropic.claude_code.chrome_bridge

JSON config (~/.claude/chrome/com.anthropic.claude_code.chrome_bridge.json):

{
  "name": "com.anthropic.claude_code.chrome_bridge",
  "description": "Claude Code Chrome Bridge",
  "path": "C:\Users\...\chrome-native-host.bat",
  "type": "stdio",
  "allowed_origins": ["chrome-extension://fcoeoabgfenejglbffodgkkbkcdhcgfn/"]
}

Expected Behavior

The native host should start successfully and allow communication between Claude Code and the Chrome extension.

Actual Behavior

The native host crashes with a Bun internal assertion failure before any communication can occur.