[Boost-bugs] [Boost C++ Libraries] #6237: unordered_set behaves differently from 1.46 to 1.48

Subject: [Boost-bugs] [Boost C++ Libraries] #6237: unordered_set behaves differently from 1.46 to 1.48
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2011-12-07 23:49:36

#6237: unordered_set behaves differently from 1.46 to 1.48
------------------------------------------------------+---------------------
 Reporter:  Chris Meyer <cmeyer1969+boost@…>          |       Owner:  danieljames
     Type:  Bugs                                      |      Status:  new        
Milestone:  To Be Determined                          |   Component:  unordered  
  Version:  Boost 1.48.0                              |    Severity:  Regression 
 Keywords:                                            |  
------------------------------------------------------+---------------------
 The following code runs OK on 1.46 but fails on 1.48. The correct output
 is "1".


 {{{
 // gcc -Iboost -lstdc++ test1.cpp

 #include <iostream>
 #include <boost/smart_ptr.hpp>
 #include <boost/unordered_set.hpp>

 namespace ns {

   typedef boost::shared_ptr<class c> cptr;
   typedef boost::unordered_set<cptr> cset;

   class c
   {
   public:
     c() { }
   };

   bool operator==(const cptr &c1, const cptr &c2) { return true; }
 }

 int main(int argc, char **argv)
 {
   ns::cptr bb1(new ns::c());
   ns::cptr bb2(new ns::c());
   ns::cset cs;
   cs.insert(boost::dynamic_pointer_cast<ns::c>(bb1));
   cs.insert(boost::dynamic_pointer_cast<ns::c>(bb1));
   cs.insert(boost::dynamic_pointer_cast<ns::c>(bb2));
   cs.insert(boost::dynamic_pointer_cast<ns::c>(bb2));
   std::cout << "This should be 1: " << cs.size() << std::endl;
 }

 }}}


 I'm using Xcode 4.2 / gcc on 10.6.8.

 i686-apple-darwin10-llvm-gcc-4.2 (GCC) 4.2.1 (Based on Apple Inc. build
 5658) (LLVM build 2336.1.00)

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/6237>
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