identified in mozilla/addons-server#16205 (comment) by @diox
less v4 makes a number of changes, one of which is less/less.js@67ce103 "Require parens after mixin call" - this is causing the less compilation step to fail. We don't fail during the assets build for this so it doesn't trigger a fail in CI; it's unclear what the actual result of this is on AMO either because there's a lot of cruft from the legacy frontend so it may be an unused file anyway.
It will be safer to fix the syntax failure in the less file for now.
identified in mozilla/addons-server#16205 (comment) by @diox
less v4 makes a number of changes, one of which is less/less.js@67ce103 "Require parens after mixin call" - this is causing the less compilation step to fail. We don't fail during the assets build for this so it doesn't trigger a fail in CI; it's unclear what the actual result of this is on AMO either because there's a lot of cruft from the legacy frontend so it may be an unused file anyway.
It will be safer to fix the syntax failure in the less file for now.