[Boost-bugs] [Boost C++ Libraries] #6311: Broken const-ref semantics

Subject: [Boost-bugs] [Boost C++ Libraries] #6311: Broken const-ref semantics
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2011-12-21 14:54:57

#6311: Broken const-ref semantics
-----------------------------------------------------+----------------------
 Reporter:  Akim Demaille <akim.demaille@…>          |       Owner:  danieljames
     Type:  Bugs                                     |      Status:  new        
Milestone:  To Be Determined                         |   Component:  unordered  
  Version:  Boost 1.48.0                             |    Severity:  Regression 
 Keywords:                                           |  
-----------------------------------------------------+----------------------
 in Boost 1.48, unordered_maps seem to have lost the semantics of constrefs
 that "enl4rge your object lifetime".

 The following runs are on a Mac OS X Lion, native clang++ 2.1 and native
 G++ 4.2.  The latter is completely wrong.  It used to be correct.  Boost
 1.48 installed via MacPorts.

 {{{
 clang++ 2.1
 $ /tmp/foo.clang
 make_map:   size: 2, bar => BAR, foo => FOO
 return_map: size: 2, bar => BAR, foo => FOO
 main:       size: 2, bar => BAR, foo => FOO

 g++ 4.2
 $ /tmp/foo.gcc
 make_map:   size: 2, bar => BAR, foo => FOO
 return_map: size: 0
 main:       size: 0
 }}}

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/6311>
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