Not allow to process .md files as of v16.5.0 when chaining with markdown loader

[fengyuanchen]

Version

16.8.1

Reproduction link

github.com

Steps to reproduce

1. git clone https://github.com/fengyuanchen/markdown-to-vue-loader
2. cd markdown-to-vue-loader
3. npm update
4. npm start

The related webpack.config.js:

module.exports = {
  // ...
  module: {
    rules: [
      {
        test: /\.md$/,
        use: [
          'vue-loader',
          'markdown-to-vue-loader',
        ],
      },
    ],
  },
};

What is expected?

The vue-loader should process the source (valid SFC) from the markdown-to-vue-loader.

What is actually happening?

Throw Error:

ERROR in ./src/examples/vue.md 1:0
Module parse failed: Unexpected token (1:0)
File was processed with these loaders:
 * ./node_modules/vue-loader/dist/index.js
 * ./index.js
You may need an additional loader to handle the result of these loaders.
> <template><div class="component-vue"><h1>Vue code blocks</h1>
| <blockquote>
| <p>Vue code block will be loaded as a Vue component by default.</p>

---

• Broken as of this commit.
• Related code is here.

[JuniorTour]

Seems to be related to #1879.

PR #1889 may fix this issue too.

[haoqunjiang]

Fixed in v16.8.2