node 版本：12.16.2

npm 版本：6.14.4

pkg quasar 版本：1.6.1

pkg @quasar/app 版本：1.4.4

本地启动项目正常（quasar dev），但是 build 的时候报错如下：

(node:29752) UnhandledPromiseRejectionWarning: Error: Expected a pseudo-class or pseudo-element.

• parser.js:137 Root._error
  [tennis-front]/[postcss-minify-selectors]/[postcss-selector-parser]/dist/parser.js:137:24
• root.js:43 Root.error
  [tennis-front]/[postcss-minify-selectors]/[postcss-selector-parser]/dist/selectors/root.js:43:25
• parser.js:392 Parser.error
  [tennis-front]/[postcss-minify-selectors]/[postcss-selector-parser]/dist/parser.js:392:25
• parser.js:685 Parser.expected
  [tennis-front]/[postcss-minify-selectors]/[postcss-selector-parser]/dist/parser.js:685:25
• parser.js:500 Parser.pseudo
  [tennis-front]/[postcss-minify-selectors]/[postcss-selector-parser]/dist/parser.js:500:25
• parser.js:649 Parser.parse
  [tennis-front]/[postcss-minify-selectors]/[postcss-selector-parser]/dist/parser.js:649:22
• parser.js:618 Parser.loop
  [tennis-front]/[postcss-minify-selectors]/[postcss-selector-parser]/dist/parser.js:618:18
• parser.js:129 new Parser
  [tennis-front]/[postcss-minify-selectors]/[postcss-selector-parser]/dist/parser.js:129:14
• processor.js:47 Processor._root
  [tennis-front]/[postcss-minify-selectors]/[postcss-selector-parser]/dist/processor.js:47:22
• processor.js:83 Processor._runSync
  [tennis-front]/[postcss-minify-selectors]/[postcss-selector-parser]/dist/processor.js:83:25
• processor.js:177 Processor.processSync
  [tennis-front]/[postcss-minify-selectors]/[postcss-selector-parser]/dist/processor.js:177:27
• index.js:34 getParsed
  [tennis-front]/[postcss-minify-selectors]/dist/index.js:34:59
• index.js:196
  [tennis-front]/[postcss-minify-selectors]/dist/index.js:196:39
• container.js:239
  [tennis-front]/[postcss]/lib/container.js:239:18
• container.js:135
  [tennis-front]/[postcss]/lib/container.js:135:18
• container.js:101 Root.each
  [tennis-front]/[postcss]/lib/container.js:101:16

(node:29752) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejectin
g 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.or

SPA ███████████████████████ chunk asset optimization [92%] OptimizeCssAssetsWebpackPlugin

看提示是因为异步方法没有 catch 的问题，但是把所有异步方法全部注释掉重新 install 和 build，依然会报这个错。