Created attachment 1102864 [details]
File: backtrace

Created attachment 1102865 [details]
File: cgroup

Created attachment 1102866 [details]
File: core_backtrace

Created attachment 1102867 [details]
File: dso_list

Created attachment 1102868 [details]
File: environ

Created attachment 1102869 [details]
File: exploitable

Created attachment 1102870 [details]
File: limits

Created attachment 1102871 [details]
File: maps

Created attachment 1102872 [details]
File: mountinfo

Created attachment 1102873 [details]
File: namespaces

Created attachment 1102874 [details]
File: open_fds

Created attachment 1102875 [details]
File: proc_pid_status

Created attachment 1102876 [details]
File: var_log_messages

*** Bug 1302569 has been marked as a duplicate of this bug. ***

*** Bug 1298287 has been marked as a duplicate of this bug. ***

This bug is still present in Gnome 3.20.

Similar problem has been detected:

Happened during Drand and Drop

reporter:       libreport-2.7.2
backtrace_rating: 4
cmdline:        /usr/bin/gnome-shell
crash_function: meta_xwayland_selection_handle_xfixes_selection_notify
executable:     /usr/bin/gnome-shell
global_pid:     28371
kernel:         4.7.0-2.fc26.x86_64
package:        gnome-shell-3.21.4-1.fc25
pkg_vendor:     Fedora Project
reason:         gnome-shell killed by SIGSEGV
runlevel:       N 5
type:           CCpp
uid:            16025

Looks like this might still be an issue. Can focus be NULL in this code ?

      if (event->owner != None && event->owner != selection->window)
        {
          MetaWaylandSurface *focus;

          focus = compositor->seat->pointer.focus_surface;
          selection->source = meta_wayland_data_source_xwayland_new (selection);
          meta_wayland_data_device_set_dnd_source (&compositor->seat->data_device,
                                                   selection->source);

          meta_wayland_data_device_start_drag (data_device,
                                               wl_resource_get_client (focus->resource),
                                               &drag_xgrab_interface,
                                               focus, selection->source,
                                               NULL);
        }

Possible fix (upstream): https://bugzilla.gnome.org/show_bug.cgi?id=770940

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Not sure if it was resolved, but at minimum, I spotted it with f25 package previously ...

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bug reports from releases that are no longer maintained. At that time
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Although we aim to fix as many bugs as possible during every release's
lifetime, sometimes those efforts are overtaken by events. Often a
more recent Fedora release includes newer upstream software that fixes
bugs or makes them obsolete.

This has been fixed upstream.

Fedora 25 changed to end-of-life (EOL) status on 2017-12-12. Fedora 25 is
no longer maintained, which means that it will not receive any further
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