Error with gradient when expandShorthandProperty is used

[everget]

Error: 'Error parsing shorthand property background: linear-gradient(90deg,transparent 0,#7db9e8). 
invalid syntax at line 1 col 17:

  linear-gradient(90deg,transparent 0,#7db9e8)
                  ^
Unexpected "9"

[guivr]

+1

Fails with:
expandToLonghand('background', 'linear-gradient(24deg, red, blue)')