ValueError: imagecolorsforindex(): Argument #2 ($color) is out of range in /Model/Image/Adapter/Gd2.php:395

[PowerClover]

if ($transparentIndex >= 0 && $transparentIndex <= imagecolorstotal($this->_imageHandler)) {

Maybe it should be changed to：

if ($transparentIndex >= 0 && $transparentIndex < imagecolorstotal($this->_imageHandler)) {