catch getWidget() exceptions thrown in render()

[u0078867]

Prerequisites

• I have read the documentation;
• In the case of a bug report, I understand that providing a SSCCE example is tremendously useful to the maintainers.

Description

When inputting an uiSchema where ui:widget is of non-existing or non-registered type, I get the error:
No widget <widget> for type <type>, thrown by getWidget() in the render() method of some component. I would like to catch it, but I was not able either via try/catch of my component rendering <Form/> (which I do understand given the async nature or React rendering), nor by the experimental unstable_handleError() in React 15+.

Steps to Reproduce

I cannot reproduce it in the playground.

Expected behavior

Possibility to catch the un-existing widget error.

Actual behavior

An error is thrown.

Version

0.49.0

[u0078867]

I understood on my own I guess: the trick (also applied in the playground example) is using a try/catch block inside a setImmediate() one, for a component wrapping <Form/>:

  componentWillReceiveProps (nextProps) {
    setImmediate(() => {
      try {
        console.log(nextProps.schema);
        console.log(nextProps.uiSchema);
        console.log(nextProps.formData);
        this.setState({
          valid: true,
          schema: nextProps.schema,
          uiSchema: nextProps.uiSchema,
          formData: nextProps.formData,
        });
      } catch (err) {
        this.setState({ valid: false });
      }
    });
  };