[Boost-bugs] [Boost C++ Libraries] #3941: match_results relies on string evaluated by regex_search()

Subject: [Boost-bugs] [Boost C++ Libraries] #3941: match_results relies on string evaluated by regex_search()
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2010-02-17 18:46:15

#3941: match_results relies on string evaluated by regex_search()
---------------------------------------------+------------------------------
 Reporter:  David Klamet <davek@…>           |       Owner:  johnmaddock 
     Type:  Bugs                             |      Status:  new         
Milestone:  Boost 1.43.0                     |   Component:  regex       
  Version:  Boost 1.40.0                     |    Severity:  Optimization
 Keywords:                                   |  
---------------------------------------------+------------------------------
 See example:
 If "text" is altered or destroyed, "matches" becomes invalid.
 Is this the desired behavior?
 -----------------------


     string pattern="^\\s*:(\\S+)\\s*";
     string text="    :command  ";

     boost::regex re(pattern);


     boost::match_results<string::const_iterator> matches;
     bool stat=boost::regex_search(text, matches, re);
     text="";   //Truncate string
     cout<<matches[1].str()<<endl;  //<<Throws sting iterator not
 dereferencable exception

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Ticket URL: <https://svn.boost.org/trac/boost/ticket/3941>
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