If you have some older code and you run ColdFusion 2016 and you use CFLOOP with a list and you have CFOUTPUT placed outside the loop than the code fails. I think this is very common.
Fails:
<cfoutput>
<cfloop list="test1,test2,test3,test4,test5" index="index" item="item">
#invoke('mycomp', 'myFunction', {index=index,item=item})#<br />
</cfloop>
</cfoutput>Workaround:
<cfloop list="test1,test2,test3,test4,test5" index="index" item="item">
<cfoutput>#invoke('mycomp', 'myFunction', {index=index,item=item})#</cfoutput><br />
</cfloop>