在诺言创建后添加finally处理程序会导致未捕获的诺言拒绝？

问题描述

如果我有这样的脚本

function timeout(ms) {
  return new Promise((resolve) => {
    setTimeout(() => {
      resolve();
    },ms);
  });
}

(async () => {
  try {
    async function throwAfterOneSecond() {
      await timeout(1000);
      throw new Error("wow");
    }

    const p1 = throwAfterOneSecond()
    p1.finally(() => {
      console.log("finally handler");
    });
    await p1;
  } catch (e) {
    console.error(e);
  }
})();

然后运行它，这将导致未处理的promise异常

$ node test.js
finally handler
Error: wow
    at throwAfterOneSecond (/home/cdiesh/test.js:13:13)
(node:3657795) UnhandledPromiseRejectionWarning: Error: wow
    at throwAfterOneSecond (/home/cdiesh/test.js:13:13)
(Use `node --trace-warnings ...` to show where the warning was created)
(node:3657795) 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(). To terminate the node process on unhandled promise rejection,use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 2)
(node:3657795) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future,promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

但是如果我使用

    const p1 = throwAfterOneSecond().finally(() => {
      console.log("finally handler");
    });

没有未处理的promise例外，一切都很好

此行为有名字吗？运行节点v14.7.0

解决方法

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