Closing by itself upon moving file to bookmarked folder

[Fifi Cek]

Problem encountered not before Ubuntu update 18.04.latest to 20.04.2.

Prerequisites:
Few folders are bookmarked to side bar.
Move a file from folder in Nautilus window to one of bookmarked folders, do it by drag and drop.
When dragging over bookmark of move destination directory hit Alt-key to get context menu.
Mouse cursor gets small question mark pictogram.
Select "Move Here" from menu.

Problem:
Open Nautilus window closes immediately.
If to reopen and check destination directory the move operation completed as desired.

Others:
Plain drag and drop without using context menu : window doesn't close - as expected.

Userspace log:
21:51:06 nautilus: Error reading events from display: Invalid argument
21:51:04 nautilus: gdk_window_get_window_type: assertion 'GDK_IS_WINDOW (window)' failed
21:51:01 nautilus: TypeError: %b requires a bytes-like object, or an object that implements __bytes__, not 'str'
21:51:01 nautilus: tip=_('Scan %s for threats...') % file.get_name(),
21:51:01 nautilus: File "/usr/share/nautilus-python/extensions/clamtk-gnome.py", line 64, in get_file_items
21:51:01 nautilus: Traceback (most recent call last):
21:51:01 nautilus: TypeError: %b requires a bytes-like object, or an object that implements __bytes__, not 'str'
21:51:01 nautilus: tip=_('Scan %s for threats...') % file.get_name(),
21:51:01 nautilus: File "/usr/share/nautilus-python/extensions/clamtk-gnome.py", line 64, in get_file_items
21:51:01 nautilus: Traceback (most recent call last):
21:50:47 nautilus: Called "net usershare info" but it failed: 'net usershare' returned error 255: net usershare: cannot open usershare directory /var/lib/samba/usershares. Error No such file or directory
Please ask your system administrator to enable user sharing.
21:50:46 dbus-daemon: [system] Activating via systemd: service name='org.freedesktop.hostname1' unit='dbus-org.freedesktop.hostname1.service' requested by ':1.143' (uid=1000 pid=14160 comm="/usr/bin/nautilus --gapplication-service " label="unconfined")
21:50:46 dbus-daemon: [session uid=1000 pid=2151] Successfully activated service 'org.gnome.Nautilus'
21:50:46 dbus-daemon: [session uid=1000 pid=2151] Activating service name='org.gnome.Nautilus' requested by ':1.22' (uid=1000 pid=2285 comm="/usr/bin/gnome-shell " label="unconfined")

user45@node13a:~$ sudo ls /var/lib/samba/
private
user45@node13a:~$ sudo apt-cache policy nautilus
nautilus:
  Installed: 1:3.36.3-0ubuntu1
  Candidate: 1:3.36.3-0ubuntu1
  Version table:
 *** 1:3.36.3-0ubuntu1 500
        500 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     1:3.36.1.1-1ubuntu2 500
        500 http://archive.ubuntu.com/ubuntu focal/main amd64 Packages

[Sebastien Bacher (seb128)]

Thank you for your bug report, the error is in /usr/share/nautilus-python/extensions/clamtk-gnome.py which seems an extension you installed, could you try removing the corresponding binary and see if that resolves the issue?

[Fifi Cek (fifi-cek)]

Thanks for hint.
Indeed clamav + few its graphical packages are installed yet in use.
clamtk-gnome package was removed then Ubuntu restarted.

Subsequently all these below apply:
Problem still reproducible.
user45@node13a:~$ sudo ls -alh /usr/share/nautilus-python/extensions/
[sudo] password for biri:
total 8.0K
drwxr-xr-x 2 root root 4.0K Jan 29 23:54 .
drwxr-xr-x 3 root root 4.0K Aug 2 01:40 ..
user45@node13a:~$

Jan 29 23:57:27 nautilus: Called "net usershare info" but it failed: 'net usershare' returned error 255: net usershare: cannot open usershare directory /var/lib/samba/usershares. Error No such file or directory
Please ask your system administrator to enable user sharing.

Jan 29 23:57:27 dbus-daemon: [session uid=1000 pid=1808] Successfully activated service 'org.gnome.Nautilus'
Jan 29 23:57:27 dbus-daemon: [session uid=1000 pid=1808] Successfully activated service 'org.gnome.Nautilus'
Jan 29 23:57:27 dbus-daemon: [session uid=1000 pid=1808] Activating service name='org.gnome.Nautilus' requested by ':1.29' (uid=1000 pid=1942 comm="/usr/bin/gnome-shell " label="unconfined")
Jan 29 23:57:24 nautilus: Error reading events from display: Invalid argument
Jan 29 23:57:24 nautilus: Error reading events from display: Invalid argument
Jan 29 23:57:22 nautilus: ../../../../../gdk/x11/gdkwindow-x11.c:5633 drawable is not a native X11 window
Jan 29 23:57:22 nautilus: ../../../../../gdk/x11/gdkwindow-x11.c:5633 drawable is not a native X11 window
Jan 29 23:57:22 nautilus: gdk_window_get_window_type: assertion 'GDK_IS_WINDOW (window)' failed
Jan 29 23:57:19 nautilus: ../../../../../gdk/x11/gdkwindow-x11.c:5633 drawable is not a native X11 window
Jan 29 23:57:19 nautilus: ../../../../../gdk/x11/gdkwindow-x11.c:5633 drawable is not a native X11 window
Jan 29 23:57:19 nautilus: ../../../../../gdk/x11/gdkwindow-x11.c:5633 drawable is not a native X11 window
Jan 29 23:57:18 nautilus: ../../../../../gdk/x11/gdkwindow-x11.c:5633 drawable is not a native X11 window
Jan 29 23:57:08 nautilus: Called "net usershare info" but it failed: 'net usershare' returned error 255: net usershare: cannot open usershare directory /var/lib/samba/usershares. Error No such file or directory
Please ask your system administrator to enable user sharing.

Jan 29 23:57:08 dbus-daemon: [session uid=1000 pid=1808] Activating via systemd: service name='org.gtk.vfs.Metadata' unit='gvfs-metadata.service' requested by ':1.41' (uid=1000 pid=2028 comm="/usr/bin/nautilus --gapplication-service " label="unconfined")
Jan 29 23:57:08 nautilus: ../../../../../gdk/x11/gdkwindow-x11.c:5633 drawable is not a native X11 window
Jan 29 23:57:08 nautilus: ../../../../../gdk/x11/gdkwindow-x11.c:5633 drawable is not a native X11 window
Jan 29 23:57:05 nautilus: Failed to load module "unity-gtk-module"
Jan 29 23:57:01 gnome-session-b: WARNING: Could not parse desktop file nautilus-autostart.desktop or it references a not found TryExec binary
Jan 29 23:57:01 gnome-session-b: WARNING: Could not parse desktop file nautilus-autostart.desktop or it references a not found TryExec binary
Jan 29 23:57:01 gnome-session-b: gnome-session-binary[1926]: WARNING: Could not parse desktop file nautilus-autostart...

[Launchpad Janitor (janitor)]

[Expired for nautilus (Ubuntu) because there has been no activity for 60 days.]