[Neos] ContentCache and uncached element throws exception

[Carsten Bleicker]

having this one with enabled content cache throwing an exception:
prototype(PIPEU.Site:SimpleBasket) < prototype(TYPO3.TypoScript:Template)
prototype(PIPEU.Site:SimpleBasket) {
	templatePath = 'resource://PIPEU.Site/Private/Templates/TypoScriptObjects/SimpleBasket.html'
	partialRootPath = 'resource://PIPEU.Site/Private/Partials'
	basketNode = ${q(site).find('basket').get(0)}

	@cache {
		mode = 'uncached'
		context {
			1 = 'documentNode'
		}
	}
}


Uncaught exception #1332491864 in line 195 of /Users/pumatertion/Sites/neos.pipeu/Data/Temporary/Development/Cache/Code/Flow_Object_Classes/TYPO3_Eel_FlowQuery_FlowQuery.php: No operation which satisfies the runtime constraints found for "find".

Any hints?