[Bug c/52880] New: -Woverride-init emitts unexpected error

["eparis at redhat dot com" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52880

             Bug #: 52880
           Summary: -Woverride-init emitts unexpected error
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: eparis@redhat.com


struct s1 {
    int s1i;
    int s1j;
};

struct s2 {
    struct s1 s1;
    int s2x;
    int s2y;
};

int main(void)
{
    struct s2 s2 = {
        .s1.s1i    = 0,
        .s2y    = 1,
        .s2x    = 2,
        .s1.s1j    = 3,
    };

    return 0;
}

$ gcc -o /tmp/tmp /tmp/tmp.c -Woverride-init
/tmp/tmp.c: In function âmainâ:
/tmp/tmp.c:18:3: warning: initialized field overwritten [-Woverride-init]
/tmp/tmp.c:18:3: warning: (near initialization for âs2â) [-Woverride-init]

If you twiddle any of the testcase, it doesn't complain.  switching the order
you initialize s2x and s2y causes it to not complain.  If you want to get 2
warnings you can declare s1 between s2x and s2y.

I see this on both:
gcc-4.7.0-1.fc17.x86_64
gcc-4.4.6-4.el6.x86_64