Got the attached crash just viewing a log file today. This appears to be related to this Qt Bug:
https://bugreports.qt.io/browse/QTBUG-55971 This bug tracks down to using a version of dbus that dates back before libdbus version 1.8.18. It appears that the version shipped is libdbus 1.2.24
As a workaround, I'm going to move the shipped dbus library out of the way and let SlickEdit use the OS installed version.