The destructor for base::MessageLoop used to have the following check:

DCHECK(current() == this || !current());

This has since then been changed to:

DCHECK((pump_ && current() == this) || (!pump_ && current() != this));

This check was changed to accommodate for when the loop being bound, due to a thread failing to be created. The problem with this change is that it doesn't account anymore for  !current(), and this is causing problems when a message loop has to be destroyed for the main thread in DLL.

Solution:

Change the check to:

  DCHECK((pump_ && (current() == this || !current())) ||
         (!pump_ && current() != this));