vue文件添加style便签webpack报错

报错内容如下：

ERROR in ./~/css-loader!./~/vue-loader/lib/style-rewriter.js?id=_v-ab8ce592&file=app.vue!./~/autoprefixer-
loader!./~/vue-loader/lib/selector.js?type=style&index=0!./src/components/app.vueModule build failed:
Error: Unsupported previous source map format: {"version":3,"sources":["src/components/app.vue?    b071b128"],"names: 

解决办法：style标签添加lang="sass"

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