From: eskimo@igloo.aq   
      
   For some reason this code throws a regex error with code 4 (error_brack).   
   Any idea why?  (sorry I'm kinda new)   
      
   #include    
   #include    
      
   using std::regex;   
   using std::string;   
      
   int main(int argc, char *argv[])   
   {   
     string pattern("[^c]ei");   
     regex re(pattern);   
     return 0;   
   }   
      
      
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