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diff --git a/gfx/cairo/cairo/src/cairo-image-surface.c b/gfx/cairo/cairo/src/cairo-image-surface.c
--- a/gfx/cairo/cairo/src/cairo-image-surface.c
+++ b/gfx/cairo/cairo/src/cairo-image-surface.c
@@ -1243,6 +1243,9 @@ static cairo_image_color_t
int x, y;
cairo_image_color_t color;
+ if (image->width == 0 || image->height == 0)
+ return CAIRO_IMAGE_IS_MONOCHROME;
+
if (image->format == CAIRO_FORMAT_A1)
return CAIRO_IMAGE_IS_MONOCHROME;