Bug#32348: va_arg trashes (double)0

[Raul Miller <rdm@test.legislate.com>]

Package: libc6
Version: 2.0.7v-1

va_arg turns 0 into 4.85442e-270 [see session below].

[Note that casting 0 to (double)0 doesn't work around the problem.]

-- 
Raul


bash-2.01$ cat >tes.c
#include <stdio.h>
#include <stdarg.h>
v(long ignore, ...) {
        va_list l;
        va_start(l, ignore);
        printf("%g\n", va_arg(l, double));
}
main(){
        v(0);
}
bash-2.01$ make tes&&./tes
cc     tes.c   -o tes
4.85442e-270
bash-2.01$ ldd tes
        libc.so.6 => /lib/libc.so.6 (0x40014000)
        /lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x40000000)
bash-2.01$ dpkg -l libc6
Desired=Unknown/Install/Remove/Purge
| Status=Not/Installed/Config-files/Unpacked/Failed-config/Half-installed
|/ Err?=(none)/Hold/Reinst-required/X=both-problems (Status,Err: uppercase=bad)
||/ Name            Version        Description
+++-===============-==============-============================================
ii  libc6           2.0.7v-1       The GNU C library version 2 (run-time files)
bash-2.01$