Variable @supports is undefined on v3.10.x

[awebdev]

Looks like support for CSS's "@support" is broken after v3.0.4, any ideas? change-log doesn't seem to have anything about it

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[matthew-dean]

I'm surprised there's not a specific test for this. Looks like it was missed. Will investigate.

[matthew-dean]

@awebdev I'm not sure what's going on for you, but there are lots of tests for @supports, and using your example on the latest version of Less (3.12.2), it compiled fine. 🤷‍♂️

[RajaJaganathan]

Still, I'm getting the same error on v3.12.2 with less-loader v7.1.0

Module build failed (from ./node_modules/mini-css-extract-plugin/dist/loader.js):
ModuleBuildError: Module build failed (from ./node_modules/less-loader/dist/cjs.js):


/* csslint ignore:start */
@supports ( -webkit-appearance: none ) or ( appearance: none )
        ^
Variable @supports is undefined