Fix author queue stuck

main.py

@@ -200,6 +200,10 @@ async def main():
     global TASK_AUTHORS, TASK_QUEUE
     bot.loop.create_task(bot.connect())
 
+    def _lower_author_task_count(task_author):
+        TASK_AUTHORS.setdefault(task_author, 1)
+        TASK_AUTHORS[task_author] -= 1
+
     # main loop
     while True:
         random.shuffle(TASK_QUEUE._queue)
@@ -209,12 +213,14 @@ async def main():
             images = await task.get_images()
         except Exception as ex:
             bot.send("PRIVMSG", target=task.channel, message=f"could not fetch images: {ex}")
+            _lower_author_task_count(task.author)
             continue
 
         try:
             image = await task.process_images(images)
         except Exception as ex:
             bot.send("PRIVMSG", target=task.channel, message=f"could not process images: {ex}")
+            _lower_author_task_count(task.author)
             continue
 
         image_bytes = BytesIO()
@@ -226,10 +232,10 @@ async def main():
             url = await task.post_image(image_bytes)
         except Exception as ex:
             bot.send("PRIVMSG", target=task.channel, message=str(ex))
+            _lower_author_task_count(task.author)
             continue
 
-        TASK_AUTHORS.setdefault(task.author, 1)
-        TASK_AUTHORS[task.author] -= 1
+        _lower_author_task_count(task.author)
 
         bot.send("PRIVMSG", target=task.channel, message=f"{url} ({task.author})")
         await asyncio.sleep(10)