I was running pdb from the command line.
	Whenever I restart, It throws the error:
	
	 Traceback (most recent call last): File "/usr/local/lib/python2.7/dist-packages/tornado/web.py", line 861, in _execute getattr(self, self.request.method.lower())(*args, **kwargs) File "main.py", line 33, in post res = user.login( platform_id, platform_type) File "main.py", line 33, in post res = user.login( platform_id, platform_type) File "/home/work/src/Python-2.7.8/Lib/bdb.py", line 49, in trace_dispatch return self.dispatch_line(frame) File "/home/work/src/Python-2.7.8/Lib/bdb.py", line 67, in dispatch_line self.user_line(frame) File "/home/work/src/Python-2.7.8/Lib/pdb.py", line 158, in user_line self.interaction(frame, None) File "/home/work/src/Python-2.7.8/Lib/pdb.py", line 210, in interaction self.cmdloop() File "/home/work/src/Python-2.7.8/Lib/cmd.py", line 142, in cmdloop stop = self.onecmd(line) File "/home/work/src/Python-2.7.8/Lib/pdb.py", line 279, in onecmd return cmd.Cmd.onecmd(self, line) File "/home/work/src/Python-2.7.8/Lib/cmd.py", line 221, in onecmd return func(arg) File "/home/work/src/Python-2.7.8/Lib/pdb.py", line 679, in do_run raise Restart Restart


	I wonder why a so big bug has not been solved.