[BUG] OAuth error: Failed to start OAuth callback server: listen EPROTONOSUPPORT: protocol not supported ::1

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?

Running /login with "claude account with subscription" method produces:

OAuth error: Failed to start OAuth callback server: listen EPROTONOSUPPORT: protocol not supported ::1

What Should Happen?

It authenticates.

Error Messages/Logs

OAuth error: Failed to start OAuth callback server: listen EPROTONOSUPPORT: protocol not supported ::1

Steps to Reproduce

1. /login
2. select "claude account with subscription" method

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

unfortunately I don't know - I only need to /login because my auth expired

Claude Code Version

2.0.14

Platform

Anthropic API

Operating System

Other

Terminal/Shell

Other

Additional Information

This is running in FreeBSD in a jail. It appears to be trying to bind to an ipv6 address (::1). I have used claude code in this same jail for a few months without issue.