It's recently gotten tricker to start Nautilus in the debugger due to gnome session's pathological restarting behavior. Instead, try attaching the debugger to the existing process and then reproduce the crash. You can do this with this command:
gdb --pid=`pidof nautilus`
then typing "c" or "continue" and pressing return when you get to the gdb prompt.
It's recently gotten tricker to start Nautilus in the debugger due to gnome session's pathological restarting behavior. Instead, try attaching the debugger to the existing process and then reproduce the crash. You can do this with this command:
gdb --pid=`pidof nautilus`
then typing "c" or "continue" and pressing return when you get to the gdb prompt.