If you run a CFOUTPUT with attributecollection you will get an error cannot find encodefor key in structure error.
Fails:
<cfset result = queryNew("id,name","Integer,Varchar",[{id=1,name="One"},{id=2,name="Two"},{id=3,name="Three"}]) />
<cfset params={query:'result'} />
<!--- this works --->
<cfoutput query="#params.query#">
#id# - #name#
</cfoutput>
<!--- this don't work --->
<cfoutput attributecollection="#params#">
#id# - #name#
</cfoutput>Workaround: set a dummy key encodefor to none
<cfset result = queryNew("id,name","Integer,Varchar",[{id=1,name="One"},{id=2,name="Two"},{id=3,name="Three"}]) />
<cfset params = {query:'result', encodefor:'none'} />
<cfoutput attributecollection="#params#">
#id# - #name#
</cfoutput>We are currently waiting for a hotfix from Adobe.