6346: If a exporter plugin crashes, the Export Assistant can't be closed

svn: r21806

gramps/gui/plug/export/_exportassistant.py

@@ -579,6 +579,8 @@ class ExportAssistant(Gtk.Assistant, ManagedWindow) :
         Depending on the success status, set the text for the final page.
         
         """
+        success = False
+        try:
             if (self.option_box_instance and 
                 hasattr(self.option_box_instance, "no_fileselect")):
                 filename = ""
@@ -592,6 +594,10 @@ class ExportAssistant(Gtk.Assistant, ManagedWindow) :
                             filename,
                             User(error=ErrorDialog, callback=self.callback),
                             self.option_box_instance)
+        except:
+            #an error not catched in the export_function itself
+            success = False
+            log.error(_("Error exporting your family tree"), exc_info=True)
         return success
     
     def pre_save(self,page):