UnhandledPromiseRejectionWarning: undefined 错误怎么解决

(node:3080) UnhandledPromiseRejectionWarning: undefined
(node:3080) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:3080) UnhandledPromiseRejectionWarning: Error: Debug Failure. False expression: Too many nodes written to output.
    at extractSingleNode

这提示错误的意思是你在项目中用了async异步，但是调用的时候没有用catch。比如

1. private async runGame() {}

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调用的时候要这样

1. this.runGame().catch(e => {
   
2.             console.log(e);
   
3.         })

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