unknown_command: log more, why is this broken

edmond/plugins/unknown_command.py

@@ -46,11 +46,13 @@ class UnknownCommandPlugin(Plugin):
         self.bot.log_d(f"Processing '{query}' with WolframAlpha.")
         try:
             response = self.client.query(query)
-        except:  # Capture any exception as this lib is not very stable.
+        except Exception as exc:  # unstable lib
+            self.bot.log_w(f"wolframalpha exception: {exc}")
             self.signal_failure(target)
             return
 
         if not response["@success"]:
+            self.bot.log_d("Call to WA succeeded but response is an error.")
             self.signal_failure(target)
             return