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Date:      Wed, 16 Feb 2005 02:16:01 +0100
From:      Pav Lucistnik <pav@FreeBSD.org>
To:        freebsd-amd64@FreeBSD.org
Subject:   va_list fun
Message-ID:  <1108516561.1564.4.camel@hood.oook.cz>
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Someone please explain to me what I'm doing wrong:

[legrace.c]
#include <stdio.h>
#include <stdarg.h>

void funny(char *format, ...) {
	va_list ap;

	va_start(ap, format);
	vfprintf(stdout, format, ap);
	vfprintf(stdout, format, ap);
	vfprintf(stdout, format, ap);
	vfprintf(stdout, format, ap);
	vfprintf(stdout, format, ap);
	va_end(ap);
}

int main(int argc, char *argv[]) {
	funny("%s\n", "string");
}


[my 4-STABLE/i386 from Dec 2 2004]
$ gcc legrace.c=20
$ ./a.out=20
string
string
string
string
string

[my 5-STABLE/i386 from Jan 3 2005]
$ gcc -O legrace.c=20
$ ./a.out=20
string
string
string
string
string

[my 5-STABLE/amd64 from Feb 10 2005]
$ gcc legrace.c
$ ./a.out
string
 =E7=FF=FF=FF

Segmentation fault (core dumped)

[sledge.freebsd.org]
$ gcc legrace.c=20
$ ./a.out=20
string
=F0=EC=FF=FF=FF

Segmentation fault (core dumped)

[pluto2.freebsd.org]
$ gcc legrace.c=20
$ ./a.out=20
string
string
string
string
string


--=20
Pav Lucistnik <pav@oook.cz>
              <pav@FreeBSD.org>

94 outdated ports on the box,
94 outdated ports.
Portupgrade one, an hour 'til done,
82 outdated ports on the box.

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