Segfault related to XDND in QXcbDrag::move

Dolphin on Arch Linux has been crashing for me when drag and dropping files to external applications for about two years now, since I started using Linux. I finally narrowed it down to a segfault in qxcbdrag.cpp on the following line: 

target_version = *(uint32_t *)xcb_get_property_value(reply.get());

reply.get() is returning a null pointer.