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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/48666] [4.6/4.7 Regression] -Warray-bounds doesn't trigger anymore for simple case
Date: Tue, 06 Dec 2011 10:27:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48666

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |INVALID

--- Comment #4 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-12-06 10:26:54 UTC ---
By design:

  /* Accesses to trailing arrays via pointers may access storage
     beyond the types array bounds.  */
...
      /* If this is the last field in a struct type or a field in a
         union type do not warn.  */
      if (!next)
        return;

both val32Tab2 and val32Tab3 might be allocated larger and used
as trailing array.  We'd warn during GCC bootstrap for our RTX union
for example.