Less compilation fails when referencing an relative path

[dverkade]

Preconditions

1. Magento version 2.3.x & 2.3-develop

Steps to reproduce

1. Add a reference to a lib source file in the theme(e.g. Luma) less files, such as:
   @import "../../../../../../../lib/web/css/source/lib/_responsive.less";
2. Try to compile the less with the following command:
   php -f bin/magento -- setup:static-content:deploy -f --jobs 1 en_US -t Magento/luma

Expected result

1. Less files are compiling because the importing a reference to a file which exists.

Actual result

Compilation from source: /var/www/html/magento2/app/design/frontend/Magento/blank/web/css/styles-l.less
Path "../../../../../lib/web/css/source/lib/_responsive.less" cannot be used with directory "/var/www/html/magento2/app/design/frontend/Magento/luma/web/i18n/enfrontend/Magento/blank/en_US                                

[m2-assistant]

Hi @dverkade. Thank you for your report.
To help us process this issue please make sure that you provided the following information:

• Summary of the issue
• Information on your environment
• Steps to reproduce
• Expected and actual results

Please make sure that the issue is reproducible on the vanilla Magento instance following Steps to reproduce. To deploy vanilla Magento instance on our environment, please, add a comment to the issue:

@magento-engcom-team give me 2.3-develop instance - upcoming 2.3.x release

For more details, please, review the Magento Contributor Assistant documentation.

@dverkade do you confirm that you was able to reproduce the issue on vanilla Magento instance following steps to reproduce?

• yes
• no

[dverkade]

As a workaround I have changed this:
@import "../../../../../../../lib/web/css/source/lib/_responsive.less";
Into this:
@import "source/lib/_responsive.less";
To make it work again.

[m2-assistant]

Hi @engcom-Charlie. Thank you for working on this issue.
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[magento-engcom-team]

✅ Confirmed by @engcom-Charlie
Thank you for verifying the issue. Based on the provided information internal tickets MC-22680 were created

Issue Available: @engcom-Charlie, You will be automatically unassigned. Contributors/Maintainers can claim this issue to continue. To reclaim and continue work, reassign the ticket to yourself.