Bitmap *src_bitmap = getGlobalBorderBitmapFromStatus(global.border_status);
Bitmap *dst_bitmap = gfx.masked_border_bitmap_ptr;
+ // may happen for "border.draw_masked.*" with undefined "global.border.*"
+ if (src_bitmap == NULL)
+ return;
+
if (x == -1 && y == -1)
return;