Test hof-044 in set misc-HigherOrderFunctions gives an unintended XPTY0004 error.

In the function

declare function local:ops() as (function(xs:double) as xs:double)* 
      	{ (abs#1, local:round#1, function($x as xs:float){$x+1}, round-half-to-even(?, 2)) }; 

the third item 

function($x as xs:float){$x+1} 

is not a valid instance of the required type

function(xs:double) as xs:double

because it will not accept xs:double arguments.