/usr/bin/compiz:11:nux::BaseWindow::IsVisible:unity::hud::Controller::GetIdealMonitor:unity::hud::Controller::Relayout:sigc::internal::signal_emit2:sigc::signal2

[errors.ubuntu.com bug bridge]

The Ubuntu Error Tracker has been receiving reports about a problem regarding compiz. This problem was most recently seen with package version 1:0.9.13.1+18.04.20171116-0ubuntu1, the problem page at https://errors.ubuntu.com/problem/0fcc03fc5c3a845f751e8d59595d3ded88c5838d 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 and are a software developer, you can request it at http://forms.canonical.com/reports/.