AwaitFire leak, chan not close

[RelicOfTesla]

func (em *Manager) AwaitFire(e Event) (err error) {
    ch := make(chan error)

    go func(e Event) {
        err := em.FireEvent(e)
        ch <- err
    }(e)

    err = <-ch
                      // MUST    close(ch)
    return
}