TYPO3 Core

When using a FORM cObject, "current" value and "field" data is not visible inside the FORM object.

The following minimal code example illustrates the issue. Outside the FORM cObject, both {GP: test} and {field: test} are visible. However inside the FORM element, only {GP: test} is visible. Apparently this information is not passed on.

lib.testForm = COA
lib.testForm {

  20 = TEXT
  # This works.
  20.data = GP : test
  20.wrap = <p>GP: |</p>

  30 = TEXT
  # And this works.
  30.data = field : test
  30.wrap = <p>Field: |</p>

  40 = FORM
  40 {
    30 = TEXT
    # This also works.
    30.data = GP : test
    30.wrap = GP: |

    40 = TEXT
    # This does not work.
    40.data = field : test
    40.wrap = Field: |
  }
}

This is the output of above typoscript:

<p>GP:31</p>
<p>Field:42</p>
<form action="test/test.html" enctype="multipart/form-data" method="post">
  <ol>
    <li class="csc-form-5 csc-form-element csc-form-element-content">GP:31</li>
    <li class="csc-form-6 csc-form-element csc-form-element-content">Field:</li>
  </ol>
</form>

As far as I can tell, the issue is that start($data, $table) is not called when creating the ContentObjectRenderer in \TYPO3\CMS\Form\Domain\Factory\TypoScriptFactory.

    protected function getLocalConentObject() {
        if (!isset($this->localContentObject)) {
            $this->localContentObject = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance('TYPO3\\CMS\\Frontend\\ContentObject\\ContentObjectRenderer');
            $this->localContentObject.start($data, $table); // This line is missing.
        }
        return $this->localContentObject;
    }

The indicated statement is missing. However I don't know where $data and $table should come from.