Mac: GDB crashed when debugging.

Steps:
1. Load example project borderlayout from getting started page.
2. Put a breakpoint at the first line of the main function.
3. Build it in desktop debug mode and try to debug it.
4. The debug process will stop at the breakpoint you have set.
5. Wait..., There is a message box pops up to notify the gdb timeout to reply.
6. Click "Stop debugging" button. GDB crash occurs and the application crashed.

The crash log is attached.