The example from the documentation worked just fine for me. What exactly are the problems you're having?

I meant this example: https://github.com/reagent-project/reagent/blob/master/doc/ReactFeatures.md#error-boundaries

I just stumbled across the example you pasted - let me try that one.

Maybe my test code is invalid or is blowing up too early or something. I'm just not seeing :component-did-catch getting called.

Ah I think I see what I am doing wrong.

Yes, it's my fault completely. I had two different rendering paths, and only one was using the error boundary.

Thank you @U2FRKM4TW