[BUG] Claude Code crashes with "panic: incorrect alignment. oh no: bun has crashed" after being idle

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?

Issue: Claude Code crashes with "panic: incorrect alignment. oh no: bun has crashed" after being idle

Description: After letting Claude Code sit idle for a period of time (without typing or interacting), it crashes with the error message "panic: incorrect alignment. oh no: bun has crashed."

Environment:

• Operating system: Windows (native / WSL - specify which)
• Installation method: Native installer
• Claude Code version: [run claude --version to get this]

Steps to reproduce:

1. Start Claude Code
2. Leave it idle without interaction for [2-5 minutes/hours]
3. Return to find the crash error

Expected behavior: Claude Code should remain stable during idle periods.

Actual behavior: Crashes with a Bun runtime panic related to memory alignment.

What Should Happen?

I shoulnt get this error

Error Messages/Logs

Steps to Reproduce

run claude and dont do anything

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.49

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

<img width="938" height="1022" alt="Image" src="https://github.com/user-attachments/assets/5b616cd5-8e3c-45e1-8301-f36fb8fb4515" />