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     38 void FileDictionary::activate()
     39 {
     40         index.clear();
     41         std::ifstream f(INDEX_FILENAME);
     42         if (f.is_open())
     43         {               
     44                 ***string line;
     45                 std::string temp;
     46         gulong pos;
     47         while(std::getline(f, temp, '\t') >> pos)
     48         {
     49             line = temp;
     50             index.insert(std::pair<****ustring, gulong>(line,pos));     
     51                         f.ignore();
     52         }
     53         }
     54         else
     55                 exit(1);
     56         
     57         fdictionary.close();
     58         fdictionary.open(DICTIONARY_FILENAME);
     59         if (!fdictionary.is_open())
     60                 exit(1);
     61 }

$ gdb program
GNU gdb 6.6-debian
Copyright (C) 2006 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i486-linux-gnu"...
Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
(gdb) break file-dictionary.cpp:40
Breakpoint 1 at 0x804fdc2: file file-dictionary.cpp, line 40.
(gdb) run
Starting program: program 
[Thread debugging using libthread_db enabled]
[New Thread -1232501056 (LWP 19194)]
[Switching to Thread -1232501056 (LWP 19194)]

Breakpoint 1, FileDictionary::activate (this=0x80c2200) at file-dictionary.cpp:41
41              std::ifstream f(INDEX_FILENAME);
(gdb) next
696             _M_impl._M_node_count = 0;
(gdb) next
693             _M_leftmost() = _M_end();
(gdb) next
695             _M_rightmost() = _M_end();
(gdb) next
446           _M_streambuf(0), _M_ctype(0), _M_num_put(0), _M_num_get(0)
(gdb) next
574           basic_istream(): _M_gcount(streamsize(0)) { }
(gdb) next
446           _M_streambuf(0), _M_ctype(0), _M_num_put(0), _M_num_get(0)
(gdb) next
574           basic_istream(): _M_gcount(streamsize(0)) { }
(gdb) next
446           _M_streambuf(0), _M_ctype(0), _M_num_put(0), _M_num_get(0)
(gdb) next
574           basic_istream(): _M_gcount(streamsize(0)) { }
(gdb) next
446           _M_streambuf(0), _M_ctype(0), _M_num_put(0), _M_num_get(0)
(gdb) next
574           basic_istream(): _M_gcount(streamsize(0)) { }
(gdb) next
443           : __istream_type(), _M_filebuf()
(gdb) next
445             this->init(&_M_filebuf);
(gdb) next
497             if (!_M_filebuf.open(__s, __mode | ios_base::in))
(gdb) next
498               this->setstate(ios_base::failbit);
(gdb) next
144           { this->clear(this->rdstate() | __state); }
(gdb) next
248           { return _M_file.is_open(); }
(gdb) next
42              if (f.is_open())
(gdb) next
60                      exit(1);
(gdb)