[BUG] ERROR Cannot assign to read only property '0' of object '[object String]'

[jgrichardson]

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?

When I try to start claude code, I get the error ERROR Cannot assign to read only property '0' of object '[object String]'

claude --version 2.0.76 (Claude Code)

node --version v20.19.6

macOS 26.1 (25B78)

iTerm2 Build 3.6.6

What Should Happen?

Claude Code should run.

Error Messages/Logs

ERROR  Cannot assign to read only property '0' of object '[object String]'

Steps to Reproduce

type claude

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

No response

Claude Code Version

2.0.76

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

iTerm2

Additional Information

No response

[github-actions[bot]]

Found 3 possible duplicate issues:

1. https://github.com/anthropics/claude-code/issues/4010
2. https://github.com/anthropics/claude-code/issues/14469
3. https://github.com/anthropics/claude-code/issues/5560

This issue will be automatically closed as a duplicate in 3 days.

• If your issue is a duplicate, please close it and 👍 the existing issue instead
• To prevent auto-closure, add a comment or 👎 this comment

🤖 Generated with Claude Code

[github-actions[bot]]

This issue has been automatically closed as a duplicate of #4010.

If this is incorrect, please re-open this issue or create a new one.

🤖 Generated with Claude Code

[github-actions[bot]]

This issue has been automatically locked since it was closed and has not had any activity for 7 days. If you're experiencing a similar issue, please file a new issue and reference this one if it's relevant.