Comment 2 for bug 181105

Added fix in revision 1336. Is this better:

> (syntax-case #'((a b c d) (1 2 3)) ()
    [((x ...) (y ...))
     #'((x y) ...)])

Unhandled exception
 Condition components:
   1. &assertion
   2. &who: ...
   3. &message: "length mismatch"
   4. &irritants: ((#<syntax 1> #<syntax 2> #<syntax 3>) (#<syntax a> #<syntax b> #<syntax c> #<syntax d>))