[Boost-bugs] [Boost C++ Libraries] #10789: unexpected behaviour with boost range join on rvalue

Subject: [Boost-bugs] [Boost C++ Libraries] #10789: unexpected behaviour with boost range join on rvalue
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2014-11-13 07:05:06

#10789: unexpected behaviour with boost range join on rvalue
-----------------------------------+------------------------
 Reporter:  Matei David <matei@…>  |      Owner:  neilgroves
     Type:  Bugs                   |     Status:  new
Milestone:  To Be Determined       |  Component:  range
  Version:  Boost 1.57.0           |   Severity:  Problem
 Keywords:                         |
-----------------------------------+------------------------
 I'm trying to append one element to a range, and iterate over the
 resulting compound range. When the rhs of the `join` is an lvalue,
 everything seems ok. However, when the rhs of the `join` is an rvalue, I'm
 seeing something unexpected.

 Specifically, when such a joined range is accessed directly by a `for(auto
 e : range)` loop, or when it is saved in a variable using `auto`, then
 iterated over, the singleton in the second container is not produced
 correctly. If however the joined range is passed by reference (other than
 non-const lvalue, obviously), then iterated over, the result is correct.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/10789>
Boost C++ Libraries <http://www.boost.org/>
Boost provides free peer-reviewed portable C++ source libraries.