JS Error

[nk-o]

Description
Not working with a set of variables, generates an error in JS (look at the browser's console).

Version
4.1.0

To Reproduce
https://ie11.ieonchrome.com/#https://codepen.io/_nK/full/zYqOZdZ

The same example, but without CSS variables (working with no problems) - https://ie11.ieonchrome.com/#https://codepen.io/_nK/full/JjXPWMO

[nk-o]

Looks like a problem with flex + calc

This one doesn't work:

flex: 0 0 calc(10 * var(--variable));

This works:

flex-grow: 0;
flex-shrink: 0;
flex-basis: calc(10 * var(--variable));

[nk-o]

Also found the problem with nested variables. Example: https://ie11.ieonchrome.com/#https://codepen.io/_nK/full/LYNNXyz