Hi,

>  Yes. I did check it out.

Ok, so did I.  On a Debian 3.1 system that is.  And sure enough, it
_did_ segfault.  For the record, my test program was:

#include <ctype.h>

int
main(void)
{
         printf("%d\n", isalpha(0x12345678));
         return 0;
}

(I.e., be sure to actually use the return value of isalpha, otherwise
gcc might optimize it away completely!)

Ciao,
Wolfgang
-- 
ws@TooLs.DE                            Wolfgang Solfrank, TooLs GmbH