[Bug c/18063] New: Gcc doesn't check overflowed size of structure

["mikulas at artax dot karlin dot mff dot cuni dot cz" <gcc-bugzilla at gcc dot gnu dot org>]

The following code compiles and runs, but shouldn't, because the size of
structure a overflows size_t type. Overflowed size is checked for arrays, for
global and local variables, but not for structures.

struct a {
        char x[0x7fffffff];
        char b[0x7fffffff];
        char c[3];
};

main()
{
        struct a *b = malloc(sizeof(struct a));
        return sizeof (struct a);
}

-- 
           Summary: Gcc doesn't check overflowed size of structure
           Product: gcc
           Version: 3.4.2
            Status: UNCONFIRMED
          Severity: minor
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: mikulas at artax dot karlin dot mff dot cuni dot cz
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18063