In article <20070111085655.GA16866@cyclonus>,
Christian Biere  <christianbiere@gmx.de> wrote:
>Christos Zoulas wrote:
>> On Jan 10, 11:45pm, andreas.wiese@instandbesetzt.net (Andreas Wiese) wrote:
>> -- Subject: lib/35401: blubb
>> 
>> How about this:
>> 
>> christos
>> 
>> Index: vfprintf.c
>> ===================================================================
>> RCS file: /cvsroot/src/lib/libc/stdio/vfprintf.c,v
>> retrieving revision 1.54
>> diff -u -u -r1.54 vfprintf.c
>> --- vfprintf.c	30 Oct 2006 05:10:40 -0000	1.54
>> +++ vfprintf.c	11 Jan 2007 02:56:58 -0000
>> @@ -353,6 +353,8 @@
>>  		if ((m = fmt - cp) != 0) {
>>  			PRINT(cp, m);
>>  			ret += m;
>> +			if (ret < 0)
>> +				goto ovfl;
>>  		}
>
>For what it's worth, this has undefined behaviour even though it probably just
>works with the current GCC.

Can you please explain which part is undefined behavior?

christos