webpack: Cheap source maps do not work with UglifyJsPlugin

I’m submitting a bug report

Webpack version: 1.13.1

Please tell us about your environment: OSX 10.11.5

Current behavior: Source maps either error or generate empty files when using UglifyJsPlugin and cheap inside devtool

Expected/desired behavior: cheap variants generate correct files when using UglifyJsPlugin

To Reproduce:

  1. Clone https://github.com/mrooding/webpack-babel-integration-example
  2. Change config to https://gist.github.com/wenbochang/b1561d4a4c20faa4f854ab28112ce8c5

This is what I get for different devtool options running webpack:

  1. source-map - works
  2. cheap-source-map - Error: Failed to parse SourceMap
  3. cheap-module-source-map - No error, but bundle.js is empty inside webpack://
  4. cheap-eval-module-source-map - No bundle.js.map file gets generated

Browser: Chrome 51

Language: ES6

Thanks in advance for your time!

About this issue

  • Original URL
  • State: closed
  • Created 8 years ago
  • Reactions: 2
  • Comments: 15 (5 by maintainers)

Commits related to this issue

Most upvoted comments

I can confirm that this bug happens in webpack@2.1.0-beta13. Steps to reproduce

  • Set devtool to 'source-map'
  • Add new webpack.optimize.UglifyJsPlugin() to the list of plugins
  • Bundle the project
  • No source maps generated
  • Remove the UglifyJsPlugin
  • Bundle the project
  • Source maps generated as expected
+3
eloytoro on Jul 8, 2016

We seem to have the opposite:

  1. source-map - Error: Failed to parse SourceMap
  2. cheap-source-map - works

Webpack 1.13.1, Ubuntu, Chrome

+2
robinelvin on Jul 7, 2016 
new UglifyJsPlugin({
  sourceMap: true
})
+1
sokra on Jul 11, 2016
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