TYPO3 Core

I had a virender-viewheler with two colons `,,` in the arguments.

      <f:render partial="GGGG/General" 
          section="Main" 
          arguments="{plan:plan,,
          pid: pid}" 
      />

After clearing the cache this bug throws an exception.
The next rendering of the page works will work fine. The re is no more eception.

I think, this bug should always throw an exeception.

P.S
I tend to tunnel vision (attitude effects) when I am programming. This would help me to notice my errors despite tunnel vision.