------- Additional Comments From ebotcazou at gcc dot gnu dot org  2005-03-29 
19:41 -------
The code is invalid: you're dereferencing a t_m pointer through a cast to
pointer to t_u.  Now the structures don't have the same alignment (t_m is 32-bit
aligned while t_u is 64-bit aligned).  I guess this accidentally worked in 3.4.x
because u was overaligned on the stack.


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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20608

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