[Bug c++/59192] New: error: use of deleted function ‘A::A(const A&)’

["olaf--mail.gcc at olafdietsche dot de" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59192

            Bug ID: 59192
           Summary: error: use of deleted function ‘A::A(const A&)’
           Product: gcc
           Version: 4.7.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: olaf--mail.gcc at olafdietsche dot de

Created attachment 31250
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=31250&action=edit
Generated with g++-4.7 -v -save-temps -c -Wall -std=c++11 a.cpp

The following snippet compiles fine with g++ 4.6 and fails with g++ 4.7 or g++
4.8 

#include <deque>
#include <vector>

struct A {
    A(const A&) = delete;
};

void f()
{
    std::vector<std::deque<A> > q;
    q.resize(4);
}

I attached the preprocessed file. If I missed a necessary part, please let
know.
System is Ubuntu 12.04

g++-4.7 -c -Wall -std=c++11 a.cpp
In file included from /usr/include/c++/4.7/deque:63:0,
                 from a.cpp:1:
/usr/include/c++/4.7/bits/stl_construct.h: In instantiation of ‘void
std::_Construct(_T1*, _Args&& ...) [with _T1 = A; _Args = {const A&}]’:
/usr/include/c++/4.7/bits/stl_uninitialized.h:77:3:   required from ‘static
_ForwardIterator
std::__uninitialized_copy<_TrivialValueTypes>::__uninit_copy(_InputIterator,
_InputIterator, _ForwardIterator) [with _InputIterator =
std::_Deque_iterator<A, const A&, const A*>; _ForwardIterator =
std::_Deque_iterator<A, A&, A*>; bool _TrivialValueTypes = false]’
/usr/include/c++/4.7/bits/stl_uninitialized.h:119:41:   required from
‘_ForwardIterator std::uninitialized_copy(_InputIterator, _InputIterator,
_ForwardIterator) [with _InputIterator = std::_Deque_iterator<A, const A&,
const A*>; _ForwardIterator = std::_Deque_iterator<A, A&, A*>]’
/usr/include/c++/4.7/bits/stl_uninitialized.h:260:63:   required from
‘_ForwardIterator std::__uninitialized_copy_a(_InputIterator, _InputIterator,
_ForwardIterator, std::allocator<_Tp>&) [with _InputIterator =
std::_Deque_iterator<A, const A&, const A*>; _ForwardIterator =
std::_Deque_iterator<A, A&, A*>; _Tp = A]’
/usr/include/c++/4.7/bits/stl_deque.h:841:9:   required from ‘std::deque<_Tp,
_Alloc>::deque(const std::deque<_Tp, _Alloc>&) [with _Tp = A; _Alloc =
std::allocator<A>; std::deque<_Tp, _Alloc> = std::deque<A>]’
/usr/include/c++/4.7/bits/stl_construct.h:77:7:   required from ‘void
std::_Construct(_T1*, _Args&& ...) [with _T1 = std::deque<A>; _Args =
{std::deque<A, std::allocator<A> >&}]’
/usr/include/c++/4.7/bits/stl_uninitialized.h:77:3:   required from ‘static
_ForwardIterator
std::__uninitialized_copy<_TrivialValueTypes>::__uninit_copy(_InputIterator,
_InputIterator, _ForwardIterator) [with _InputIterator = std::deque<A>*;
_ForwardIterator = std::deque<A>*; bool _TrivialValueTypes = false]’
/usr/include/c++/4.7/bits/stl_uninitialized.h:119:41:   required from
‘_ForwardIterator std::uninitialized_copy(_InputIterator, _InputIterator,
_ForwardIterator) [with _InputIterator = std::deque<A>*; _ForwardIterator =
std::deque<A>*]’
/usr/include/c++/4.7/bits/stl_uninitialized.h:260:63:   required from
‘_ForwardIterator std::__uninitialized_copy_a(_InputIterator, _InputIterator,
_ForwardIterator, std::allocator<_Tp>&) [with _InputIterator = std::deque<A>*;
_ForwardIterator = std::deque<A>*; _Tp = std::deque<A>]’
/usr/include/c++/4.7/bits/stl_uninitialized.h:283:69:   required from
‘_ForwardIterator std::__uninitialized_move_if_noexcept_a(_InputIterator,
_InputIterator, _ForwardIterator, _Allocator&) [with _InputIterator =
std::deque<A>*; _ForwardIterator = std::deque<A>*; _Allocator =
std::allocator<std::deque<A> >]’
/usr/include/c++/4.7/bits/vector.tcc:554:5:   required from ‘void
std::vector<_Tp, _Alloc>::_M_default_append(std::vector<_Tp,
_Alloc>::size_type) [with _Tp = std::deque<A>; _Alloc =
std::allocator<std::deque<A> >; std::vector<_Tp, _Alloc>::size_type = long
unsigned int]’
/usr/include/c++/4.7/bits/stl_vector.h:647:4:   required from ‘void
std::vector<_Tp, _Alloc>::resize(std::vector<_Tp, _Alloc>::size_type) [with _Tp
= std::deque<A>; _Alloc = std::allocator<std::deque<A> >; std::vector<_Tp,
_Alloc>::size_type = long unsigned int]’
a.cpp:11:15:   required from here
/usr/include/c++/4.7/bits/stl_construct.h:77:7: error: use of deleted function
‘A::A(const A&)’
a.cpp:5:5: error: declared here


g++-4.7 -v
Using built-in specs.
COLLECT_GCC=g++-4.7
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.7/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro
4.7.3-1ubuntu1' --with-bugurl=file:///usr/share/doc/gcc-4.7/README.Bugs
--enable-languages=c,c++,go,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-4.7 --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--with-gxx-include-dir=/usr/include/c++/4.7 --libdir=/usr/lib --enable-nls
--with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug
--enable-libstdcxx-time=yes --enable-gnu-unique-object --enable-plugin
--with-system-zlib --enable-objc-gc --with-cloog --enable-cloog-backend=ppl
--disable-cloog-version-check --disable-ppl-version-check --enable-multiarch
--disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --with-tune=generic --enable-checking=release
--build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 4.7.3 (Ubuntu/Linaro 4.7.3-1ubuntu1)
>From gcc-bugs-return-435092-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 19 16:05:27 2013
Return-Path: <gcc-bugs-return-435092-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Delivered-To: listarch-gcc-bugs@gcc.gnu.org
Received: (qmail 31727 invoked by alias); 19 Nov 2013 16:05:27 -0000
Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-bugs.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-help@gcc.gnu.org>
Sender: gcc-bugs-owner@gcc.gnu.org
Delivered-To: mailing list gcc-bugs@gcc.gnu.org
Received: (qmail 31702 invoked by uid 48); 19 Nov 2013 16:05:24 -0000
From: "mtewoodbury at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/59193] New: Unused postfix operator temporaries
Date: Tue, 19 Nov 2013 16:05:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: c
X-Bugzilla-Version: unknown
X-Bugzilla-Keywords:
X-Bugzilla-Severity: minor
X-Bugzilla-Who: mtewoodbury at gmail dot com
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags:
X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status bug_severity priority component assigned_to reporter
Message-ID: <bug-59193-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 7bit
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-SW-Source: 2013-11/txt/msg01869.txt.bz2
Content-length: 1025

http://gcc.gnu.org/bugzilla/show_bug.cgi?idY193

            Bug ID: 59193
           Summary: Unused postfix operator temporaries
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: minor
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: mtewoodbury at gmail dot com

The use of postfix operators without using the value in their inherent
temporary store is a mild abuse of languages that provide those operators.
Compilers convert them to prefix operators as part of their optimization
process, but they waste space in automatic storage when the optimization is
insufficiently deep to detect them.

Reading the code in this project turns up hundreds of instances of this poor
practice.  Please convert these to the proper prefix operator form.

(More to the point, please accept patches that fix these problems without
abuse!  I have several sets that I will submit if there are no strong
objections.)