[jfx19] RFR: 8290331 Binding value left null when immediately revalidated in invalidation listener

[Kevin Rushforth]

On Thu, 14 Jul 2022 23:37:31 GMT, John Hendrikx <jhendrikx at openjdk.org> wrote:

> I introduced a bug with the fluent bindings PR which affects all ObjectBindings.
> 
> This is the code that fails:
> 
>         SimpleObjectProperty<Boolean> condition = new SimpleObjectProperty<>(true);
>         ObservableValue<String> binding = condition.map(Object::toString);
> 
>         binding.addListener(o -> { binding.getValue(); });
> 
>         condition.set(false);
> 
>         assertEquals(false, binding.getValue());  // returns null (!)
> 
> This PR fixes this problem and adds a test case to cover it.

Good catch. And yes, this needs to go into JavaFX 19.

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PR: https://git.openjdk.org/jfx/pull/829