Html Webpack Plugin:
<pre>
  Error: Child compilation failed:
  Module build failed (from ./node_modules/pug-loader/index.js):
  Error: ENOENT: no such file or directory, open '/Users/shigeru.yoneda/workspace/slash print/slashprint/src/pug/single.pug':
  Error: ENOENT: no such file or directory, open '/Users/shigeru.yoneda/workspace/slash print/slashprint/src/pug/single.pug'
  ModuleBuildError: Module build failed (from ./node_modules/pug-loader/index.js):
  Error: ENOENT: no such file or directory, open '/Users/shigeru.yoneda/workspace/slash print/slashprint/src/pug/single.pug'
  
  - NormalModule.js:316 
    [slashprint]/[webpack]/lib/NormalModule.js:316:20
  
  - LoaderRunner.js:367 
    [slashprint]/[loader-runner]/lib/LoaderRunner.js:367:11
  
  - LoaderRunner.js:203 
    [slashprint]/[loader-runner]/lib/LoaderRunner.js:203:19
  
  - CachedInputFileSystem.js:85 
    [slashprint]/[enhanced-resolve]/lib/CachedInputFileSystem.js:85:15
  
  - task_queues:76 processTicksAndRejections
    node:internal/process/task_queues:76:11
  
  - child-compiler.js:131 
    [slashprint]/[html-webpack-plugin]/lib/child-compiler.js:131:18
  
  - Compiler.js:343 
    [slashprint]/[webpack]/lib/Compiler.js:343:11
  
  - Compiler.js:681 
    [slashprint]/[webpack]/lib/Compiler.js:681:15
  
  
  - Hook.js:154 AsyncSeriesHook.lazyCompileHook
    [slashprint]/[tapable]/lib/Hook.js:154:20
  
  - Compiler.js:678 
    [slashprint]/[webpack]/lib/Compiler.js:678:31
  
  
  - Hook.js:154 AsyncSeriesHook.lazyCompileHook
    [slashprint]/[tapable]/lib/Hook.js:154:20
  
  - Compilation.js:1423 
    [slashprint]/[webpack]/lib/Compilation.js:1423:35
  
  
  - Hook.js:154 AsyncSeriesHook.lazyCompileHook
    [slashprint]/[tapable]/lib/Hook.js:154:20
  
  - Compilation.js:1414 
    [slashprint]/[webpack]/lib/Compilation.js:1414:32
  
  
  - Hook.js:154 AsyncSeriesHook.lazyCompileHook
    [slashprint]/[tapable]/lib/Hook.js:154:20
  
  - Compilation.js:1409 
    [slashprint]/[webpack]/lib/Compilation.js:1409:36
  
  
</pre>