Qt5 started to use libproxy and this exposed a crashing bug on OpenBSD when using Qt5 applications on Gnome 3. Here's a sample backtrace: https://gist.github.com/mulander/c03997ae7e3fe4e30af0d4f2ce2965f0 The issue is caused by an unguarded dereference of ign_ip. Other parts of the code properly expect that sockaddr_from_string might return null and guard against it. Adding a proper guard prevents a segfault both in OpenBSD www/otter-browser and devel/zeal. Issue reported upstream in: https://github.com/libproxy/libproxy/issues/24 OK zhuk@ aja@