How to catch exceptions in asynchronous functions?

Question

Python

For example, a piece of code (new message event in telethon):

@client.on(events.NewMessage(chats=('chat')))
      async def normal_handler(event):
        print(event.message.id)
        posts = await client(functions.messages.GetHistoryRequest(
        peer=event.message.to_id,
        limit=1,
        offset_date=None,
        offset_id=0,
        max_id=0,
        min_id=0,
        add_offset=0,
        hash=0))
        print(posts)

If somewhere below async you make an error or even a syntactically incorrect expression, the program does not crash with an exception, but hangs stupidly and silently. How to fix this? How to catch errors?