grunt watch触发grunt发生崩溃

Question

我可以运行grunt watch，但是当运行grunt发送时，它会给我一个警告。这是什么意思，如何调试，为什么在运行独立的grunt手表时没有检测到它，我需要担心它吗？

示例：

grunt watch
    Waiting...
    //all is fine

grunt serve
    Running "serve" task
    Running "sass:dist" (sass) task
    ...
    Running "watch" task
        Waiting...
        (node:29289) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): Error: Exited with code 3
        // serve command is still running (not sure if it works)