Description

Issue reported via email (which I wasn't able to reproduce in LESS v4.2.1):

1. The following CSS is generating an error

   .card:is(a:not(.test), .good) {
     color: red;
   }

This valid syntax generates an error in LESS v4.1.3 but this bug was fixed in LESS v4.2.2 and later (including v4.3.0).

Also, it would be useful for debugging purposes if the LESS version within Stylus was listed in the Stylus options page or its readme (or both).

System Information

• OS: Any
• Browser: Any
• Stylus Version: Any

Screenshots, links, CSS