Last ditch attempt to log main() thread crashes.

econtext/core.py

@@ -831,6 +831,7 @@ class ExternalContext(object):
 
     def main(self, key, log_level):
         self._setup_master(key)
+        try:
             try:
                 self._setup_logging(log_level)
                 self._setup_importer()
@@ -839,7 +840,10 @@ class ExternalContext(object):
 
                 self.broker.register(self.context)
                 self._dispatch_calls()
-            LOG.debug('ExternalContext.main() exitting')
+                LOG.debug('ExternalContext.main() normal exit')
+            except Exception:
+                LOG.exception('ExternalContext.main() crashed')
+                raise
         finally:
             self.broker.shutdown()
             self.broker.join()