You have to ignore all those destructor calls in the stacktraces because
they're probably side-effects of unwinding after an exception. The real
question is what exception occurred. The log shows it was:

terminate called after throwing an instance of 
'boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<std::runtime_error>
 >'
  what():  Failed to set DRM crtc

** Summary changed:

- unity-system-compositor crashed with SIGABRT in 
__gnu_cxx::__verbose_terminate_handler()
+ unity-system-compositor crashed with SIGABRT in 
__gnu_cxx::__verbose_terminate_handler() [  what():  Failed to set DRM crtc]

** Also affects: mir
   Importance: Undecided
       Status: New

** Information type changed from Private to Public

** Changed in: unity-system-compositor (Ubuntu)
       Status: New => Invalid

** Changed in: mir
   Importance: Undecided => Critical

** Changed in: mir
    Milestone: None => 0.1.8

** Summary changed:

- unity-system-compositor crashed with SIGABRT in 
__gnu_cxx::__verbose_terminate_handler() [  what():  Failed to set DRM crtc]
+ unity-system-compositor crashed [what():  Failed to set DRM crtc]

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https://bugs.launchpad.net/bugs/1294510

Title:
  unity-system-compositor crashed [what():  Failed to set DRM crtc]

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