Comment 1 for bug 1677523

Lack of a core file/backtrace appears to be Mir's fault:
examples/server_example.cpp: char const command_fmt[] = "/usr/share/apport/recoverable_problem --pid %d";

No application should be doing that. We have error reporting built into the OS, which is more reliable.

Try this:
$ ulimit -c unlimited
$ mir_demo_server --on-fatal-error-abort

Do you get a core file?