TUI crash: undefined is not an object (evaluating 'u().overflow')

Description

The opencode TUI crashed with an unexpected error.

Error: undefined is not an object (evaluating 'u().overflow')

Stack trace:

TypeError: undefined is not an object (evaluating 'u().overflow')
    at <anonymous> (/$bunfs/root/opencode:4698:10548)
    at OYc (/$bunfs/root/opencode:3746:11555)
    at wLe (/$bunfs/root/opencode:3746:11316)
    at ir (/$bunfs/root/opencode:3746:5624)
    at kZg (/$bunfs/root/opencode:4698:10530)
    at vS (/$bunfs/root/opencode:3746:8436)
    at <anonymous> (/$bunfs/root/opencode:3746:22215)
    at OYc (/$bunfs/root/opencode:3746:11555)
    at wLe (/$bunfs/root/opencode:3746:11316)
    at ir (/$bunfs/root/opencode:3746:5624)

Plugins

No response

OpenCode version

1.18.30

Steps to reproduce

Reported automatically from the opencode crash screen. If you can, describe what you were doing when it crashed.

Screenshot and/or share link

No response

Operating System

macOS 27.0.0 (arm64)

Terminal

Apple_Terminal 488