As per https://wiki.ubuntu.com/DebuggingProgramCrash I added the ddebs repositories
echo "deb http://ddebs.ubuntu.com $(lsb_release -cs) main restricted universe multiverse" >> /etc/apt/sources.list.d/ddebs.list echo -e "deb http://ddebs.ubuntu.com $(lsb_release -cs)-updates main restricted universe multiverse\ndeb http://ddebs.ubuntu.com $(lsb_release -cs)-proposed main restricted universe multiverse" >> /etc/apt/sources.list.d/ddebs.list apt install ubuntu-dbgsym-keyring apt update Then for each of the packages you mentioned, I need to run "apt-cache policy $name", write down the version number in "Installled" then "apt install ${name}-dbgsym=${version}" for each one. (I hope I don't need to do this for all 84 libraries linked by nm-applet.) dpkg -S `which nm-applet` apt install network-manager-gnome-dbgsym=1.8.20-1ubuntu1 ldd `which nm-applet` |egrep 'libglib|libgtk|network-manager' dpkg -S /usr/lib/x86_64-linux-gnu/libgtk-3.so.0 apt-cache policy libgtk-3-0 apt install libgtk-3-0-dbgsym=3.24.8-1ubuntu1 dpkg -S /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 apt-cache policy libglib2.0-0 apt install libglib2.0-0-dbgsym=2.60.0-1 Then following the instructions in https://wiki.ubuntu.com/Backtrace again. New backtrace is attached to this comment. ** Attachment added: "nm-applet.backtrace.2019-05-06.txt" https://bugs.launchpad.net/ubuntu/+source/network-manager-applet/+bug/1799213/+attachment/5261728/+files/nm-applet.backtrace.2019-05-06.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1799213 Title: Gtk-CRITICAL gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager-applet/+bug/1799213/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
