TYPO3.Fluid

When setting an object as value in View Helpers extending Tx_Fluid_ViewHelpers_Form_AbstractFormViewHelper, a fatal error is thrown.

<f:form.textbox value="{someObject}" />

->

Fatal error: Call to a member function getBackend() on a non-object in [TYPO3ROOT]\typo3conf\ext\fluid\Classes\ViewHelpers\Form\AbstractFormViewHelper.php on line 84

Reason:
Some left overs from the Fluid backport:

if (is_object($this->arguments['value']) && NULL !== $this->persistenceManager->getBackend()->getUUIDByObject($this->arguments['value'])) {
    $name .= '[__identity]';
}

This should rather be something like:

if (is_object($this->arguments['value']) && is_callable(array($this->arguments['value'], 'getUid'))) {
    $name .= '[uid]';
}

as in renderHiddenIdentityField() of the FormViewHelper.