Panic: close of closed channel in status component cleanup #3294

Description

OpenCode crashed with a panic during cleanup:

panic: close of closed channel
goroutine 1 [running]:
github.com/sst/opencode/internal/components/status.(*statusComponent).Cleanup(0xc00048e540)
        /home/runner/work/opencode/opencode/packages/tui/internal/components/status/status.go:319 +0x25
github.com/sst/opencode/internal/tui.Model.Cleanup(...)
        /home/runner/work/opencode/opencode/packages/tui/internal/tui/tui.go:948
main.main()
        /home/runner/work/opencode/opencode/packages/tui/cmd/opencode/main.go:166 +0xce9
Terminated

The error occurs in the status component's Cleanup method at line 319, indicating a channel is being closed multiple times.

OpenCode version

0.15.7

Steps to reproduce

1. Start implementation of a task
2. Encounter an error during execution
3. OpenCode attempts cleanup and panics

Root cause

The Cleanup() method is likely being called multiple times without guards against double-close. Possible causes:

• Missing synchronization (no sync.Once)
• No check for channel state before closing
• Multiple cleanup paths calling Cleanup() without re-entry protection

Suggested fix

Implement idempotent cleanup in status.go:319:

// Option 1: sync.Once
var cleanupOnce sync.Once
func (s *statusComponent) Cleanup() {
    cleanupOnce.Do(func() {
        close(s.channel)
    })
}

// Option 2: State tracking
if !s.closed {
    close(s.channel)
    s.closed = true
}

Screenshot and/or share link

No response

Operating System

WSL2 (Windows Subsystem for Linux) running NixOS - Kernel 6.6.87.2-microsoft-standard-WSL2

Terminal

Powershell