Clearing the number input in mo.ui.slider(include_input=True) element causes UIElement's onchange handler error #6555
Description
Describe the bug
Setup: before the error.
After the error
Stack trace
Traceback (most recent call last):
File ".../.venv/lib/python3.13/site-packages/marimo/_runtime/runtime.py", line 1785, in set_ui_element_value
component._update(value)
~~~~~~~~~~~~~~~~~^^^^^^^
File ".../.venv/lib/python3.13/site-packages/marimo/_plugins/ui/_core/ui_element.py", line 456, in _update
self._value = self._convert_value(value)
~~~~~~~~~~~~~~~~~~~^^^^^^^
File ".../.venv/lib/python3.13/site-packages/marimo/_plugins/ui/_impl/input.py", line 365, in _convert_value
return cast(Numeric, self._dtype(value))
~~~~~~~~~~~^^^^^^^
TypeError: int() argument must be a string, a bytes-like object or a real number, not 'NoneType'
An exception was raised by a UIElement's on_change handler:
Will you submit a PR?
- Yes
Environment
{
"marimo": "0.16.2",
"editable": false,
"location": "/data/ems/stephens-notebooks/.venv/lib/python3.13/site-packages/marimo",
"OS": "Linux",
"OS Version": "6.8.0-84-generic",
"Processor": "x86_64",
"Python Version": "3.13.1",
"Locale": "en_US",
"Binaries": {
"Browser": "--",
"Node": "v22.16.0"
},
"Dependencies": {
"click": "8.3.0",
"docutils": "0.22.2",
"itsdangerous": "2.2.0",
"jedi": "0.19.2",
"markdown": "3.9",
"narwhals": "2.5.0",
"packaging": "25.0",
"psutil": "7.1.0",
"pygments": "2.19.2",
"pymdown-extensions": "10.16.1",
"pyyaml": "6.0.3",
"starlette": "0.48.0",
"tomlkit": "0.13.3",
"typing-extensions": "4.15.0",
"uvicorn": "0.35.0",
"websockets": "15.0.1"
},
"Optional Dependencies": {
"duckdb": "1.4.0",
"polars": "1.33.1",
"pyarrow": "21.0.0",
"loro": "1.8.1",
"sqlglot": "27.19.0"
},
"Experimental Flags": {}
}
Code to reproduce
import marimo as mo
mo.ui.slider(start=0, stop=10, step=1, include_input=True)
In the UI, clear out the value of the number input.