Comment 18 for bug 1201246

How about back port this patch to 4.7 branch?
It cause a lot of compile error which easily confuse programmers.

(In reply to comment #9)
> Author: paolo
> Date: Mon Apr 2 00:13:30 2012
> New Revision: 186058
>
> URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=186058
> Log:
> /cp
> 2012-04-01 Paolo Carlini <email address hidden>
>
> PR c++/50043
> * class.c (deduce_noexcept_on_destructor,
> deduce_noexcept_on_destructors): New.
> (check_bases_and_members): Call the latter.
> * decl.c (grokfndecl): Call the former.
> * method.c (implicitly_declare_fn): Not static.
> * cp-tree.h (deduce_noexcept_on_destructor, implicitly_declare_fn):
> Declare
>
> /testsuite
> 2012-04-01 Paolo Carlini <email address hidden>
>
> PR c++/50043
> * g++.dg/cpp0x/noexcept17.C: New.
> * g++.old-deja/g++.eh/cleanup1.C: Adjust.
> * g++.dg/tree-ssa/ehcleanup-1.C: Likewise.
> * g++.dg/cpp0x/noexcept01.C: Likewise.
> * g++.dg/eh/init-temp1.C: Likewise.
> * g++.dg/eh/ctor1.C: Likwise.
>
> Added:
> trunk/gcc/testsuite/g++.dg/cpp0x/noexcept17.C
> Modified:
> trunk/gcc/cp/ChangeLog
> trunk/gcc/cp/class.c
> trunk/gcc/cp/cp-tree.h
> trunk/gcc/cp/decl.c
> trunk/gcc/cp/method.c
> trunk/gcc/testsuite/ChangeLog
> trunk/gcc/testsuite/g++.dg/cpp0x/noexcept01.C
> trunk/gcc/testsuite/g++.dg/eh/ctor1.C
> trunk/gcc/testsuite/g++.dg/eh/init-temp1.C
> trunk/gcc/testsuite/g++.dg/tree-ssa/ehcleanup-1.C
> trunk/gcc/testsuite/g++.old-deja/g++.eh/cleanup1.C