Minor LESS Variable Issue

[DeviateDefiant]

Deploying static content:

Compilation from source:
frontend/Magento/luma/en_US/css/print.less
variable @modal-slide-header__padding-vertical is undefined in file /var/view_preprocessed/css/frontend/Magento/luma/en_US/css/source/_theme.less in _theme.less on line 254, column 37
252| //  Modal popup
253| @modal-action-close__font-size: @font-size__base;
254| @modal-slide-action-close__padding: @modal-slide-header__padding-vertical @modal-popup__padding;
255|
256| //  Checkout tooltip icon
257| @checkout-tooltip-icon__font-size: 21px;>

Removing the variable it'll compile fine.

[zanilee]

Related issue #2273

[dmitrii-fediuk]

My fix for a similar problem with the frontend product gallery: https://mage2.pro/t/188

[dmitrii-fediuk]

My universal fix for all the «variable @modal-slide-header__padding-vertical is undefined» problems: https://mage2.pro/t/193

[MomotenkoNatalia]

@DeviateDefiant Internal ticket MAGETWO-45071 is closed and delivered to mainline. Please, let us know if you still have an issue.