less.js: Missing selector when using sourcemaps, plugins, and compiling Less files in parallel

I have some code like bottom.

	@root-name: business-bundle
    /* other file */
	.@{root-name} .wrapper{
		/* css... */
	}

When webpack use less 3.12.2, that is ok. But when use 3.13.0, webpack build error.

About this issue

Original URL
State: closed
Created 4 years ago
Reactions: 1
Comments: 29 (14 by maintainers)

Commits related to this issue

Fixes #3574 — committed to matthew-dean/less.js by matthew-dean 4 years ago
Fixes #3574 (#3575) * Fixes #3574 * Bump version and dist files — committed to olederle/less.js by matthew-dean 4 years ago

Most upvoted comments

@PengJiyuan @kirazxyun @Justineo etc please try testing with less@3.13.0-alpha.3

matthew-dean on Dec 17, 2020

4.0.0 is also published, which contains this fix.

matthew-dean on Dec 20, 2020

3.13.1 published

matthew-dean on Dec 18, 2020

@PengJiyuan You’re right, the code in question shouldn’t fail outputting the chunk if source map building doesn’t work. It should be like:

                if (inputSource === undefined) {
                    this._css.push(chunk);
                    return;
                }

That would be a short-term fix, with the longer term fix being figuring out why one of the files has an incorrect import mapping. (It’s probably being re-used when compiled in parallel.)

So I can do the temporary band-aid solution soon, and figure out the cause after.

matthew-dean on Dec 17, 2020

@PengJiyuan Can you create a reproducible example in a cloneable repo?

https://github.com/kirazxyun/less-question

This repo can reproduce the problem. You can run with ‘npm run build’，then view the results in the dist folder.

kirazxyun on Dec 17, 2020