If Queue::Shutdown() sends nil into q.shutdown before the goroutine in Queue::Start() creates the channel, the send will block indefinitely as q.shutdown would still be a nil channel.
Running the following a few times should reproduce the issue.
package main
import (
"context"
"git.sr.ht/~sircmpwn/dowork"
)
func main() {
task := work.NewTask(func(ctx context.Context) error {
return nil
})
work.Enqueue(task)
work.Shutdown()
}