Problems with ONEARGCHECK and TWOARGCHECK

Today I recognized a strange behaviour of the code of ONEARGCHECK and
TWOARGCHECK which test the correct number of arguments of a Maxima function.

A correct example for the Gamma function:

(%i2) gamma(1,2);
Wrong number of arguments to gamma
 -- an error.  To debug this try debugmode(true);
(%i3) gamma();
Wrong number of arguments to gamma
 -- an error.  To debug this try debugmode(true);

But when I test the Bessel J function I get the following:

(%i4) bessel_j(1);
(%o4) bessel_j(1, #<compiled-closure 03cd5e38>)
(%i5) bessel_j(1,2,3);
(%o5) bessel_j(1, 2)

One more example for the Airy function:

(%i7) airy_ai();
(NIL . |$;|) is a cons with an atomic cdr - `simplifya'
 -- an error.  To debug this try debugmode(true);

(%i8) airy_ai(1,2);
(%o8) airy_ai(1)

Is this only a problem of my system? What is wrong?

I use gcl 2.6.8 and the Maxiam CVS code on a Windows XP system.

Dieter Kaiser