env presets in .babelrc seem to be ignored starting 6.3.1

I’m submitting a bug report

Webpack Version: 1.14.0

Babel Core Version: 6.23.1

Babel Loader Version: 6.3.1

Please tell us about your environment: macOS Sierra 10.12.2

Current behavior: Even when I include the “react” as a presets, with .babelrc like

{
  "env": {
    "development": {
      "presets": ["es2015", "react"],
...

it doesn’t seem to be used, got errors like Module build failed: SyntaxError: Unexpected token (33:2) complaining about the JSX syntax.

I noticed this is a new behavior in version 6.3.1. With everything else being the same, if one simply npm install babel-loader 6.3.0, the error will be gone.

Also note that the non-environment specific settings are fine, for example, .babelrc like this works:

{
  "presets": ["es2015", "react"],
  "env": {
    "development": {      
...

Expected/desired behavior: The presets specified in the “env” section in .babelrc are used.

[danez]

I released 6.3.2 with the fix, I’m still not entirely sure why this happened.

[wkillerud]

Noticed this as well, where plugins defined in “env” would not have their settings applied, which broke our test setup.

Webpack version: 2.2.1

Babel core version: 6.23.0

Babel loader version: 6.3.1

Please tell us about your environment: Ubuntu 16.04.1 LTS 64-bit

Current behavior: A .babelrc file with different options for different NODE_ENV, for instance

{
  "presets": [
    "latest"
    "react"
  ],
  "env": {
    "coverage": {
      "plugins": [
        "rewire",
        ["istanbul", {
          "exclude": [
            "src/test"
          ]
        }],
        ["root-import", [{
          "rootPathSuffix": "src/main"
        }, {
          "rootPathPrefix": "@",
          "rootPathSuffix": "src/test"
        }]]
      ]
    },
    "test": {
      "plugins": [
        "rewire",
        ["root-import", [{
          "rootPathSuffix": "src/main"
        }, {
          "rootPathPrefix": "@",
          "rootPathSuffix": "src/test"
        }]]
      ]
    }
  }
}

Options for NODE_ENV=coverage and NODE_ENV=test are not applied, leading to errors when root-import and rewire plugins are not applied.

Expected/desired behavior: The presets specified in the “env” section in .babelrc are used.

Workaround: Use babel-loader 6.3.0