Failed to compile with errors when I used `pug` template

[fengxinming]

Version

3.0.4

Reproduction link

https://github.com/fengxinming/vuecli3-demo

Node and OS info

node v8.11.1, npm 6.4.1, macOS

Steps to reproduce

npm i
npm run build

What is expected?

Build complete

What is actually happening?

Error: Child compilation failed:
Module build failed (from ./node_modules/_pug-plain-loader@1.0.0@pug-plain-loader/index.js):
TypeError: Cannot read property 'options' of undefined

• TypeError: Cannot read property 'options' of undefined

• compiler.js:79 childCompiler.runAsChild
  [vuecli3-demo]/[_html-webpack-plugin@3.2.0@html-webpack-plugin]/lib/compiler.js:79:16

• Compiler.js:290 compile
  [vuecli3-demo]/[_webpack@4.20.2@webpack]/lib/Compiler.js:290:11

• Compiler.js:547 hooks.afterCompile.callAsync.err
  [vuecli3-demo]/[_webpack@4.20.2@webpack]/lib/Compiler.js:547:14

• Hook.js:154 AsyncSeriesHook.lazyCompileHook
  [vuecli3-demo]/[_tapable@1.1.0@tapable]/lib/Hook.js:154:20

• Compiler.js:544 compilation.seal.err
  [vuecli3-demo]/[_webpack@4.20.2@webpack]/lib/Compiler.js:544:30

• Hook.js:154 AsyncSeriesHook.lazyCompileHook
  [vuecli3-demo]/[_tapable@1.1.0@tapable]/lib/Hook.js:154:20

• Compilation.js:1296 hooks.optimizeAssets.callAsync.err
  [vuecli3-demo]/[_webpack@4.20.2@webpack]/lib/Compilation.js:1296:35

• Hook.js:154 AsyncSeriesHook.lazyCompileHook
  [vuecli3-demo]/[_tapable@1.1.0@tapable]/lib/Hook.js:154:20

• Compilation.js:1287 hooks.optimizeChunkAssets.callAsync.err
  [vuecli3-demo]/[_webpack@4.20.2@webpack]/lib/Compilation.js:1287:32

• index.js:287
  [vuecli3-demo]/[_uglifyjs-webpack-plugin@1.3.0@uglifyjs-webpack-plugin]/dist/index.js:287:11

• Runner.js:67 Runner.runTasks
  [vuecli3-demo]/[_uglifyjs-webpack-plugin@1.3.0@uglifyjs-webpack-plugin]/dist/uglify/Runner.js:67:9

• index.js:198 UglifyJsPlugin.optimizeFn
  [vuecli3-demo]/[_uglifyjs-webpack-plugin@1.3.0@uglifyjs-webpack-plugin]/dist/index.js:198:16

[haoqunjiang]

template: '!!pug-plain-loader!public/index.pug',

[fengxinming]

@sodatea this issues was not resolved, because index-default.html was compiled

[haoqunjiang]

Sorry for providing the false solution.
See the correct config here: #2601 (comment)