catch errors in inital startup and report them before dying

ankiqt/ui/main.py

@@ -30,6 +30,7 @@ config = ankiqt.config
 class AnkiQt(QMainWindow):
     def __init__(self, app, config, args):
         QMainWindow.__init__(self)
+        try:
             self.errorOccurred = False
             self.inDbHandler = False
             self.reviewingStarted = False
@@ -95,6 +96,10 @@ class AnkiQt(QMainWindow):
                 self.deck.syncName):
                 self.syncDeck(interactive=False)
             signal.signal(signal.SIGINT, self.onSigInt)
+        except:
+            ui.utils.showInfo("Error during startup:\n%s" %
+                              traceback.format_exc())
+            sys.exit(1)
 
     def onSigInt(self, signum, frame):
         self.close()