I have download the kde4 version of ktorrent through svn, and make it a kdevelop project.
then I began to debug it step by step, then this problem occurs,in main.cpp:
kt::App::addCmdLineOptions();
* if (!kt::App::start())
{
fprintf(stderr, "ktorrent is already running !\n");
return 0;
}
if (!GrabPIDLock())
{
fprintf(stderr, "ktorrent is already running !\n");
return 0;
}

the cursor disappeared at line '*', and I can't find the definition of kt::App::start() in app.cpp, too. who can help me, what should i do?