step-by-step degugging goes on different path than a normal execution

[Ofni Chadesch]

Binary package hint: kdbg

Hello,
I don't know if this is a kdbg related bug, or there is something related with my program. Please bear with me. It seems that when I open a file it goes all well and nice on the actual execution, while an inspection of the code throws a failure.
To help you replicate this problem, I appended to this report the content of the c++ source code and I attached the text file.
Thank you for your time,

version: kdbg 2.2.0 3.5.10, Kubuntu (karmic) 4:3.5.10.dfsg.1-2ubuntu7.2
(this is not the package from ubuntu repositories,
but the one form kdbg website .deb package thanks to Ana Beatriz Guerrero Lopez)
OS: Linux (x86_64) release 2.6.31-19-generic (Kubuntu Karmic 9.10)
Compiler: Target: x86_64-linux-gnu

--asdf.cpp(the source file)-------------
#include <fstream>
#include <iostream>
#include <string>
using namespace std;

int main (){
  string data="input test";
  ifstream infile;
  cout << "Reading from the file" << endl;
infile.open(data.c_str());
if(!infile.is_open())
  throw ios_base::failure::failure("");
getline(infile, data);
while(!infile.eof()){
  getline(infile, data);
  cout << data << endl;}
infile.close();
return 0;}
----------------------------------------------------------------------
I compiled this file using the following command:
g++ -Wall -Wextra -pedantic -g -o run asdf.cpp
(version information g++ (Ubuntu 4.4.1-4ubuntu9) 4.4.1)
----------------------------------------------------------------------
----------------------------------------------------------------------
Thank you again, hope to hear from you soon.

[Ofni Chadesch (ulawe)]

Surprisingly when I use gdb it doesn't have this problem, so the failure is confined to kdbg.
GNU gdb (GDB) 7.0-ubuntu configured as "x86_64-linux-gnu"

[Ofni Chadesch (ulawe)]

I can't believe in five year no one even acknowledged this bug.