Poppler rectangles are not necessarily in good order
Submitted by Jose Aliste
So, in the bug https://bugs.freedesktop.org/show_bug.cgi?id=82898. there were some pixman warnings that actually originated in the pdf-backend. I traced back to assuming that rectangles always come as "(Lower Left point Upper Right point)" which is not true according to the PDF spec. Thus, we need to add some code to correctly process the unlikely but existent case of silly rectangles.