[Bug 358374] [NEW] irritating bogus warnings on strcmp

[Thorsten Glaser]

Public bug reported:

Binary package hint: gcc-snapshot

Bug in gcc-snapshot-20090327-0ubuntu1

=== test programme ===

tglase at tglase:~$ cat t.c
#include <string.h>

int
testfunc(const char **wp)
{
        int argc;

        for (argc = 0; wp[argc]; argc++)
                ;

        if (strcmp(wp[0], "[") == 0) {
                if (strcmp(wp[--argc], "]") != 0) {
                        return (1);
                }
                return (2);
        }
        return (3);
}


=== old vs. new gcc ===

tglase at tglase:~$ cc -Wall -g -O2 -fno-strict-aliasing -fstack-protector-
all -fwrapv -std=gnu99 -c t.c

tglase at tglase:~$ /usr/lib/gcc-snapshot/bin/gcc -Wall -g -O2 -fno-strict-aliasing -fstack-protector-all -fwrapv -std=gnu99 -c t.c
t.c: In function 'testfunc':
t.c:11: warning: offset '3' outside bounds of constant string
t.c:12: warning: offset '3' outside bounds of constant string

=== environment ===

• jaunty schroot

tglase at tglase:~$ dpkg -l gcc gcc-snapshot
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Cfg-files/Unpacked/Failed-cfg/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Hold/Reinst-required/X=both-problems (Status,Err: uppercase=bad)
||/ Name                  Version               Description
+++-=====================-=====================-==========================================================
ii  gcc                   4:4.3.3-1ubuntu1      The GNU C compiler
ii  gcc-snapshot          20090327-0ubuntu1     A SNAPSHOT of the GNU Compiler Collection

** Affects: gcc-snapshot (Ubuntu)
     Importance: Undecided
         Status: New

-- 
irritating bogus warnings on strcmp
https://bugs.launchpad.net/bugs/358374
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