vue-cli-service serve compiles successfully, but my code is missing from the bundled output.

[ViggieM]

Hello,

I need some guidance on investigating an issue I have running vue-cli-service serve. I have a weird issue where simply duplicating lines of console.log(...) has the effect that the source code is not present in the bundled output, although it compiles successfully.

I described the question on stackoverflow in more detail. Can you help me with some hints where I should start investigating the issue?

[ViggieM]

I have found out the answer by using vue-cli-service inspect

The entry points for webpack seemed weird to me, as it assumed that the entrypoint for app is also main.js

### WRONG
entry: {
  app: [
    './src/main.js',
    '<directory path>/src/vue.js'
  ],
  main: [
    '<directory path>/src/main.js'
  ]
}

So i changed my vue.config.js to account for this wrong assumption and this is what the output of inspect is:

### THIS WORKS
entry: {
  app: [
    './src/main.js',
    '<directory path>/src/main.js'
  ],
  otherstuff: [
    '<directory path>/src/index.js'
  ]
}

Now this makes no problems anymore.

Maybe this is a bug in webpack or vue-cli, since the behaviour is totally random and worked for a long while, but the problem only appeared after the size of the codebase increased?