[Boost-bugs] [Boost C++ Libraries] #3632: match_results and singular iterator woes with msvc-10.0

Subject: [Boost-bugs] [Boost C++ Libraries] #3632: match_results and singular iterator woes with msvc-10.0
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2009-11-17 22:21:45

#3632: match_results and singular iterator woes with msvc-10.0
------------------------------------------------+---------------------------
 Reporter:  eric_niebler                        |       Owner:  johnmaddock
     Type:  Bugs                                |      Status:  new        
Milestone:  Boost 1.41.0                        |   Component:  regex      
  Version:  Boost 1.40.0                        |    Severity:  Problem    
 Keywords:  regex iterator debugging msvc-10.0  |  
------------------------------------------------+---------------------------
 Hi John, I just fixed a similar issue in xpressive and thought that it
 would probably manifest in your lib, too. Sure enough. The msvc-10.0 beta
 has new iterator debugging that is very strict. The following code causes
 a crash in match_results::swap:

 {{{
 #include <boost/regex.hpp>

 int main()
 {
     using namespace boost;
     regex rx("\\w+");
     smatch what0, what1;
     std::string hello("hello");
     if(regex_match(hello, what0, rx))
     {
         what0.swap(what1);
     }
 }
 }}}

 The problem is that what1.m_base is a singular iterator at this point. The
 swap tries to assign from it, which is verboten.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/3632>
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