/usr/bin/gzserver-7.0.0:11:std::__atomic_base:std::atomic:gazebo::event::EventT:gazebo::event::EventT:gazebo::physics::World::Update

[errors.ubuntu.com bug bridge]

The Ubuntu Error Tracker has been receiving reports about a problem regarding gazebo. This problem was most recently seen with package version 7.0.0+dfsg-2, the problem page at https://errors.ubuntu.com/problem/afa84775c2024cac5b79096a8dda5e781486109a 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/.