/usr/bin/gnome-disks:6:g_assertion_message:g_assertion_message_expr:start_benchmark:gdu_benchmark_dialog_show:g_closure_invoke

The Ubuntu Error Tracker has been receiving reports about a problem regarding gnome-disk-utility. This problem was most recently seen with package version 3.22.0-1ubuntu1, the problem page at https://errors.ubuntu.com/problem/bcc7bf1a308186503f7f0f271e48c9636978ea4e contains more details, including versions of packages affected, stacktrace or traceback, and individual crash reports.
If you do not have access to the Ubuntu Error Tracker you can request it at http://forms.canonical.com/reports/.