bot: show traceback in debug logs on unhandled exc

edmond/bot.py

@@ -3,6 +3,8 @@ import json
 import os
 import time
 import signal
+import sys
+import traceback
 from pathlib import Path
 from typing import Any, Iterable, Optional
 
@@ -123,8 +125,11 @@ class Bot(irc.client.SimpleIRCClient, Logger):
             self.start()
         except KeyboardInterrupt:
             self.log_i("Caught keyboard interrupt.")
-        except Exception as exc:  # Yes, I know, who are you going to call?
+        except Exception as exc:
             self.log_c(f"Caught unhandled exception: {exc}")
+            _, _, exc_traceback = sys.exc_info()
+            for line in traceback.format_tb(exc_traceback):
+                self.log_d(line.rstrip())
         finally:
             self.cleanup()