import gradio as gr

DESCRIPTION = """\
Reproduction for [gradio#13663](https://github.com/gradio-app/gradio/issues/13663).
The chat function is a generator that returns without yielding anything when the
message is `skip`.

1. Send `hello`. The bot streams `hi`.
2. Send `skip`.

**Before the fix (this Space):** the event errors out with
`RuntimeError: async generator raised StopAsyncIteration`.

**After the fix:** no bot response, the conversation above stays intact, and the
textbox is re-enabled.
"""


def chat(message, history):
    if message == "skip":
        return
    yield "hi"


demo = gr.ChatInterface(chat, title="gradio#13663", description=DESCRIPTION)

if __name__ == "__main__":
    demo.launch(ssr_mode=False)