V3 patch causes EH failures in ILP32 mode

[Gabriel Dos Reis]

You Wrote Mark Mitchell
>
> In:
>
>   2004-05-22  Benjamin Kosnik  <bkoz@redhat.com>
>
> 	* libsupc++/cxxabi.h: Remove duplicated and useless public and
>         private keywords in class declarations. Format. Use
>         stddef.h. Expose declarations to "C" compilation.
>         * libsupc++/tinfo.cc (__upcast_result): Add copy constructor and
>         assignment operator.
>         (__dyncast_result): Same.
>         * libsupc++/vec.cc (uncatch_exception): Same, use member
>         initialization list.
>
> you added seemingly pointless implementations of __upcast_result's
> copy constructor and assignment operator; these versions are almost
> identical to the implicit definitions.  On HP-UX in ILP32 mode, this
> change is causing several G++ testsuite failures relating to upcasts
> during EH processing.

I missed that change.  I believe it was done to shut up -Weffec++.
If it were up to me, I would remove -Weffec++ from the compiler.