bug: fails to find bestMatch under some situations

[Timer]

bestMatch is not always located before this branch is triggered.

As a result, there's a Cannot read property 'pop' of undefined error fired.

Here's a really small project that reproduces the issue:
https://github.com/Timer/extract-css-chunks-webpack-plugin-bug

This same exact input works with mini-css-extract-plugin, so it might be worth finding where logic diverges!

Node: v12.14.1
extract-css-chunks-webpack-plugin: 4.7.4

[ScriptedAlchemy]

hmm okay. Ill re-sync with mini-css
i have a PR open to that project anyways

[ScriptedAlchemy]

So the version in your repo you made was an older one. Either way im not able to replicate this

Are you sure youre using the latest copy? These projects are nearly the same at the moment

[ScriptedAlchemy]

this syncs it with mini-css and my performance improvement made (currently open pr)
https://github.com/faceyspacey/extract-css-chunks-webpack-plugin/pull/226/files

[ScriptedAlchemy]

perhaps rm -rf node_moduels, yarn cache clean, yarn --force

[Timer]

So the version in your repo you made was an older one. Either way im not able to replicate this

Are you sure youre using the latest copy? These projects are nearly the same at the moment

Positive! See the yarn.lock file which has resolved to 4.7.4:
https://github.com/Timer/extract-css-chunks-webpack-plugin-bug/blob/448c3b4974790c1e2c542f27525b49eacbcee083/yarn.lock#L2612-L2613

[Timer]

I went ahead and explicitly upgraded the package to remove doubts:
Timer/extract-css-chunks-webpack-plugin-bug@39a5cb8

[Timer]

❯ rm -rf node_modules && git rev-parse HEAD && yarn install && yarn why extract-css-chunks-webpack-plugin && yarn next build

39a5cb8b150b51577f5dfa32a5be2cc147867476

yarn install v1.21.1
[1/4] 🔍  Resolving packages...
[2/4] 🚚  Fetching packages...
[3/4] 🔗  Linking dependencies...
warning " > css-loader@3.4.2" has unmet peer dependency "webpack@^4.0.0 || ^5.0.0".
warning " > extract-css-chunks-webpack-plugin@4.7.4" has unmet peer dependency "webpack@^4.4.0 || ^5.0.0".
warning "extract-css-chunks-webpack-plugin > webpack-external-import@1.1.1" has unmet peer dependency "webpack@^4.40.2".
warning " > optimize-css-assets-webpack-plugin@5.0.3" has unmet peer dependency "webpack@^4.0.0".
[4/4] 🔨  Building fresh packages...
✨  Done in 9.55s.

yarn why v1.21.1
[1/4] 🤔  Why do we have the module "extract-css-chunks-webpack-plugin"...?
[2/4] 🚚  Initialising dependency graph...
[3/4] 🔍  Finding dependency...
[4/4] 🚡  Calculating file sizes...
=> Found "extract-css-chunks-webpack-plugin@4.7.4"
info Has been hoisted to "extract-css-chunks-webpack-plugin"
info This module exists because it's specified in "devDependencies".
info Disk size without dependencies: "140KB"
info Disk size with unique dependencies: "732KB"
info Disk size with transitive dependencies: "6.02MB"
info Number of shared dependencies: 13
✨  Done in 0.57s.

yarn run v1.21.1
$ /Users/joe/Desktop/scratch/extract-css-chunks-webpack-plugin-bug/node_modules/.bin/next build
Warning: Production code optimization has been disabled in your project. Read more: https://err.sh/zeit/next.js/minification-disabled
Creating an optimized production build  

Failed to compile.

chunk styles
static/css/19d7f5d5.chunk.css
Cannot read property 'pop' of undefined

> Build error occurred
Error: > Build failed because of webpack errors
    at build (/Users/joe/Desktop/scratch/extract-css-chunks-webpack-plugin-bug/node_modules/next/dist/build/index.js:10:900)
    at runMicrotasks (<anonymous>)
    at processTicksAndRejections (internal/process/task_queues.js:94:5)
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

[pavelzubov]

Any plans to solve this problem?

[benitocas88]

The same problem for us. For now we downgrade to the version next@9.1.0 and works good for now.

[fivethreeo]

webpack-contrib/mini-css-extract-plugin#341

[ScriptedAlchemy]

Is anyone willing to open a PR if they have found the exact issue? @Timer is there anything I need to do on my side to patch this?

[Timer]

@ScriptedAlchemy we no longer use this plugin in Next.js, so I'm not sure.

The users who ran into this issue might know if it still reproduces:
vercel/next.js#10161

[ScriptedAlchemy]

Booooo!

Haha all good. I’m maintaining mini-css more than this. Since I merged my hmr capabilities in, I only use this repo to test prereleases of mini css

[ghost]

please any news about this? because i still stuck on this issue