This looks like https://bugzilla.xfce.org/show_bug.cgi?id=14281 which was somewhat patched in version 1.8.2.
Please check if you can still trigger the crash with the new version. https://launchpad.net/~xubuntu-dev/+archive/ubuntu/experimental ** Bug watch added: Xfce Bugzilla #14281 https://bugzilla.xfce.org/show_bug.cgi?id=14281 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1802997 Title: thunar crashes sporadically creating files on network shares To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/thunar/+bug/1802997/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs