This is a poppler bug. I've attached a patch at https://bugs.freedesktop.org/show_bug.cgi?id=80719 to fix it.
** Bug watch added: freedesktop.org Bugzilla #80719 https://bugs.freedesktop.org/show_bug.cgi?id=80719 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1317517 Title: Transparent area background filled with black in pdf To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cairo/+bug/1317517/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
