[Boost-bugs] [Boost C++ Libraries] #11303: boost::next(i, n) compilation error with -D_GLIBCXX_DEBUG

Subject: [Boost-bugs] [Boost C++ Libraries] #11303: boost::next(i, n) compilation error with -D_GLIBCXX_DEBUG
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2015-05-14 11:34:24

#11303: boost::next(i,n) compilation error with -D_GLIBCXX_DEBUG
------------------------------+---------------------------
 Reporter:  pawels@…          |      Owner:  no-maintainer
     Type:  Bugs              |     Status:  new
Milestone:  To Be Determined  |  Component:  utility
  Version:  Boost 1.58.0      |   Severity:  Regression
 Keywords:                    |
------------------------------+---------------------------
 std::map provides bidirectional iterator while boost::next(i,n) tries
 to use the plus-assign which is random iterator specific.

 {{{
 % g++ -Wall gcc-bug.cpp -c -Og -isystem
 ~/dvm/sandbox/buildenv/boost-1.58.0/include -D_GLIBCXX_DEBUG
 In file included from /usr/include/c++/4.9.2/debug/map.h:33:0,
                  from /usr/include/c++/4.9.2/debug/map:33,
                  from /usr/include/c++/4.9.2/map:66,
                  from gcc-bug.cpp:2:
 /usr/include/c++/4.9.2/debug/safe_iterator.h: In instantiation of
 ‘__gnu_debug::_Safe_iterator<_Iterator, _Sequence>&
 __gnu_debug::_Safe_iterator<_Iterator, _Sequence>::operator+=(const
 difference_type&) [with _Iterator = std::_Rb_tree_iterator<std::pair<const
 int, int> >; _Sequence = std::__debug::map<int, int>;
 __gnu_debug::_Safe_iterator<_Iterator, _Sequence>::difference_type = long
 int]’:
 /home/pawels/dvm/sandbox/buildenv/boost-1.58.0/include/boost/next_prior.hpp:73:11:
 required from ‘static T boost::next_prior_detail::next_impl1<T, Distance,
 true>::call(T, Distance) [with T =
 __gnu_debug::_Safe_iterator<std::_Rb_tree_iterator<std::pair<const int,
 int> >, std::__debug::map<int, int> >; Distance = int]’
 /home/pawels/dvm/sandbox/buildenv/boost-1.58.0/include/boost/next_prior.hpp:151:67:
 required from ‘T boost::next(T, Distance) [with T =
 __gnu_debug::_Safe_iterator<std::_Rb_tree_iterator<std::pair<const int,
 int> >, std::__debug::map<int, int> >; Distance = int]’
 gcc-bug.cpp:8:66:   required from here
 /usr/include/c++/4.9.2/debug/safe_iterator.h:357:13: error: no match for
 ‘operator+=’ (operand types are ‘std::_Rb_tree_iterator<std::pair<const
 int, int> >’ and ‘const difference_type {aka const long int}’)
   _M_current += __n;
              ^
 }}}

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/11303>
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