Bug in Textbox object, empty string crashes app

[Kumaraswamy]

@Appsbeheerder

The app will crash or in the companion it warns with an 'undefined' warning when getting an empty string as value.

That's a bug in the companion app, when specific error conditions occur, the companion app fails to handle it, thus crashing the application.

AI2LiveDebug: Helps tracing problems and runtime errors

AI2 Debug This tool makes it easier to find out where errors happen in your app by giving you a clear list of the traces leading up to the error. With the Live Debug feature, you can also trace the application's actions. Like when ButtonClick event is triggered, it will be logged accordingly and displayed live. Why extension? Normally when there is a runtime error in your application, AppInventor dosent show you much information like the trace map, it only shows a message telling what's wrong. …

Perhaps adding this may help?

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@TIMAI2

Are you certain it is just a string being returned, not an object ?

If that's the case, I believe YailRuntimeError should have been thrown.

@Kevinkun

Or null? If null It will crash

It is probably the case.