Traceback (most recent call last):


 "/Users/hekaisheng/Documents/mars_dev/mars/mars/utils.py", line 339, in _wrapped

return func(*args, **kwargs)


 "/Users/hekaisheng/Documents/mars_dev/mars/mars/scheduler/graph.py", line 436, in get_chunk_graph

return self._chunk_graph_builder.iterative_chunk_graphs[-1]
IndexError: list index out of range

Traceback (most recent call last):


 "./mwe.py", line 14, in <module>

loop.run()


 "python3.7/site-packages/urwid/main_loop.py", line 287, in run

self._run()


 "python3.7/site-packages/urwid/main_loop.py", line 385, in _run

self.event_loop.run()


 "python3.7/site-packages/urwid/main_loop.py", line 790, in run

self._loop()


 "python3.7/site-packages/urwid/main_loop.py", line 818, in _loop

self._entering_idle()


 "python3.7/site-packages/urwid/main_loop.py", line 779, in _entering_idle

callback()


 "python3.7/site-packages/urwid/main_loop.py", line 574, in entering_idle

self.draw_screen()


 "python3.7/site-packages/urwid/main_loop.py", line 589, in draw_screen

self.screen.draw_screen(self.screen_size, canvas)


 "python3.7/site-packages/urwid/raw_display.py", line 810, in draw_screen

row, back, ins = self._last_row(row)


 "python3.7/site-packages/urwid/raw_display.py", line 897, in _last_row

del new_row[-1]
IndexError: list assignment index out of range
