# Source: upstream

# see: https://bugs.php.net/bug.php?id=70976

# this fix (adapted):

# https://github.com/php/php-src/commit/2baeb167a08b0186a885208bdc8b5871f1681dc8.diff

diff --git a/ext/gd/libgd/gd_interpolation.c b/ext/gd/libgd/gd_interpolation.c

--- a/ext/gd/libgd/gd_interpolation.c

+++ b/ext/gd/libgd/gd_interpolation.c

@@ -2154,7 +2154,7 @@ gdImagePtr gdImageRotateInterpolated(const gdImagePtr src, const float angle, in

 {

 	const int angle_rounded = (int)floor(angle * 100);

-	if (bgcolor < 0) {

+	if (bgcolor < 0 || (!src->trueColor && bgcolor >= gdMaxColors)) {

 		return NULL;

 	}