gr.render with triggers occurs bug

[BLESS11186]

Describe the bug

After update to 5.9.0 gr.render makes error.
I think there is a problem with this PR(#10190).
To check if trigger.callback is None is needed.

gradio/gradio/renderable.py:149

if trigger.callback:
    trigger.callback(trigger.__self__) # type: ignore

Have you searched existing issues? 🔎

• I have searched and found no existing issues

Reproduction

import gradio as gr

with gr.Blocks() as demo:
    with gr.Row():
        n = gr.Number(0)
        btn = gr.Button("Click me")

    @gr.render(inputs=[n], triggers=[btn.click])
    def _render(n):
        for i in range(n):
            gr.Textbox(str(i))

demo.launch()

Screenshot

No response

Logs

Traceback (most recent call last):
  File ".../test_app.py", line 8, in <module>
    @gr.render(inputs=[n], triggers=[btn.click])
     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File ".../anaconda3/envs/gradio-test/lib/python3.12/site-packages/gradio/renderable.py", line 149, in render
    trigger.callback(trigger.__self__)  # type: ignore
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: 'NoneType' object is not callable

System Info

Gradio Environment Information:
------------------------------
Operating System: Linux
gradio version: 5.9.0
gradio_client version: 1.5.2

------------------------------------------------
gradio dependencies in your environment:

aiofiles: 23.2.1
anyio: 4.6.2.post1
audioop-lts is not installed.
fastapi: 0.115.5
ffmpy: 0.4.0
gradio-client==1.5.2 is not installed.
httpx: 0.27.2
huggingface-hub: 0.26.2
jinja2: 3.1.4
markupsafe: 2.1.5
numpy: 2.1.3
orjson: 3.10.11
packaging: 24.2
pandas: 2.2.3
pillow: 10.4.0
pydantic: 2.9.2
pydub: 0.25.1
python-multipart: 0.0.19
pyyaml: 6.0.2
ruff: 0.7.4
safehttpx: 0.1.6
semantic-version: 2.10.0
starlette: 0.41.3
tomlkit: 0.12.0
typer: 0.13.1
typing-extensions: 4.12.2
urllib3: 2.2.3
uvicorn: 0.32.0
authlib; extra == 'oauth' is not installed.
itsdangerous; extra == 'oauth' is not installed.


gradio_client dependencies in your environment:

fsspec: 2024.10.0
httpx: 0.27.2
huggingface-hub: 0.26.2
packaging: 24.2
typing-extensions: 4.12.2
websockets: 12.0

Severity

Blocking usage of gradio

[abidlabs]

cc @aliabid94