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Unfortunately, I haven't been able to track down why we hithttps://github.com/webpack-contrib/mini-css-extract-plugin/blob/master/src/hmr/hotModuleReplacement.js#L54 and havenull returned. So I haven't been able to create a demo repo (we are using rails andwebpacker to run webpack).

However, if you reach L54 for any reason then it will crash the webpack becausehttps://github.com/webpack-contrib/mini-css-extract-plugin/blob/master/src/hmr/hotModuleReplacement.js#L137 will always throw an error trying to runnnull.some().

It appears null is the incorrect thing to return when no src is found, instead an empty array makes more sense.

Any progress on this PR? I'm experiencing the error and sadly it prevents me to hot reload styling. 😢

@AntonioRedondo - I run a forked version now, since this hasn't been fixed. Given the fact this does fix it, and null is obviously incorrect since later on it runs.some() on the value. I don't know why this hasn't been fixed/merged. Regardless of the test case or not, you can literally just read the code and see this path will always throw.@evilebottnawi

You can run the forked version as
"mini-css-extract-plugin": "npm:@ro-savage/mini-css-extract-plugin",

We experience that as well with somevue component that dosen't contains any style section... Will try to track down a little if I can