title: Exit when logging in to Cisco Packet Tracer
body: <p>When I log in the Cisco Packet Tracer authentication page, as long as I click next, the program will automatically exit. If you start the program from the command line, it displays:
  Starting Packet Tracer 7.2.2
  /usr/local/bin/packettracer: line 8:  6290 Floating point exception(core dumped) ./PacketTracer7 "$@" > /dev/null 2>&amp;1</p>
  
  <p>After debugging with GDB, you will see:
  Thread 1 "PacketTracer7" received signal SIGFPE, Arithmetic exception.
  0x00007fffeede5ef4 in QFontEngineFT::averageCharWidth() const () from ./libQt5XcbQpa.so.5</p>