ipython 8+ python crash on exception #13598
Description
Since version 8 in Ipython I frequently - very frequently - get IPython crashes (termination) of the kind below.
I think the specific situation is that I edit code, I use autoreload(3), there is a bug, but when IPython tries traceback it crashes and terminates. Since a main point of using IPython is the auto-reload, this makes it almost unusable for development compared to Version 7.x.x. (Certainly distracting enough to spend the time to finally post it here.)
I have seen there is a few other bugs of that kind reported, but I was not sure which would be similar enough to any of them, hence I post this separately. My apologies for any duplications.
I am not sure whether the error is strictly reproducible as it happens in situations when code is edited.
I use Python 3.10.2 built from source on Linux (Fedora 34).
I am using pylab mode which loads matplotlib, I am not sure whether their event loop may interfere with IPython.
Just a thought.
In [15]: m.plot1()
Error in sys.excepthook:
Traceback (most recent call last):
File "/home/alex/Python/lib/python3.10/site-packages/IPython/core/interactiveshell.py", line 1979, in showtraceback
stb = value._render_traceback_()
AttributeError: 'NotOneValueFound' object has no attribute '_render_traceback_'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/alex/Python/lib/python3.10/site-packages/IPython/core/interactiveshell.py", line 1981, in showtraceback
stb = self.InteractiveTB.structured_traceback(etype,
File "/home/alex/Python/lib/python3.10/site-packages/IPython/core/ultratb.py", line 1105, in structured_traceback
return FormattedTB.structured_traceback(
File "/home/alex/Python/lib/python3.10/site-packages/IPython/core/ultratb.py", line 999, in structured_traceback
return VerboseTB.structured_traceback(
File "/home/alex/Python/lib/python3.10/site-packages/IPython/core/ultratb.py", line 871, in structured_traceback
formatted_exceptions += self.format_exception_as_a_whole(etype, evalue, etb, lines_of_context,
File "/home/alex/Python/lib/python3.10/site-packages/IPython/core/ultratb.py", line 804, in format_exception_as_a_whole
frames.append(self.format_record(r))
File "/home/alex/Python/lib/python3.10/site-packages/IPython/core/ultratb.py", line 723, in format_record
result += ''.join(_format_traceback_lines(frame_info.lines, Colors, self.has_colors, lvals))
File "/home/alex/Python/lib/python3.10/site-packages/stack_data/utils.py", line 145, in cached_property_wrapper
value = obj.__dict__[self.func.__name__] = self.func(obj)
File "/home/alex/Python/lib/python3.10/site-packages/stack_data/core.py", line 698, in lines
pieces = self.included_pieces
File "/home/alex/Python/lib/python3.10/site-packages/stack_data/utils.py", line 145, in cached_property_wrapper
value = obj.__dict__[self.func.__name__] = self.func(obj)
File "/home/alex/Python/lib/python3.10/site-packages/stack_data/core.py", line 649, in included_pieces
pos = scope_pieces.index(self.executing_piece)
File "/home/alex/Python/lib/python3.10/site-packages/stack_data/utils.py", line 145, in cached_property_wrapper
value = obj.__dict__[self.func.__name__] = self.func(obj)
File "/home/alex/Python/lib/python3.10/site-packages/stack_data/core.py", line 628, in executing_piece
return only(
File "/home/alex/Python/lib/python3.10/site-packages/executing/executing.py", line 164, in only
raise NotOneValueFound('Expected one value, found 0')
executing.executing.NotOneValueFound: Expected one value, found 0
Original exception was:
Traceback (most recent call last):
File "/home/alex/Python/lib/python3.10/site-packages/IPython/core/interactiveshell.py", line 3361, in run_code
exec(code_obj, self.user_global_ns, self.user_ns)
File "<ipython-input-15-0de954ff7b19>", line 1, in <cell line: 1>
File "/home/alex/python/source/multistar/base.py", line 586, in plot1
rr = norm(self.y[self.y_rad])
AttributeError: 'Direct' object has no attribute 'y_rad'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/alex/Python/lib/python3.10/site-packages/IPython/core/interactiveshell.py", line 1979, in showtraceback
stb = value._render_traceback_()
AttributeError: 'AttributeError' object has no attribute '_render_traceback_'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/alex/Python/lib/python3.10/site-packages/IPython/core/interactiveshell.py", line 3301, in run_ast_nodes
if await self.run_code(code, result, async_=asy):
File "/home/alex/Python/lib/python3.10/site-packages/IPython/core/interactiveshell.py", line 3378, in run_code
self.showtraceback(running_compiled_code=True)
File "/home/alex/Python/lib/python3.10/site-packages/IPython/core/interactiveshell.py", line 1981, in showtraceback
stb = self.InteractiveTB.structured_traceback(etype,
File "/home/alex/Python/lib/python3.10/site-packages/IPython/core/ultratb.py", line 1105, in structured_traceback
return FormattedTB.structured_traceback(
File "/home/alex/Python/lib/python3.10/site-packages/IPython/core/ultratb.py", line 999, in structured_traceback
return VerboseTB.structured_traceback(
File "/home/alex/Python/lib/python3.10/site-packages/IPython/core/ultratb.py", line 852, in structured_traceback
formatted_exception = self.format_exception_as_a_whole(etype, evalue, etb, number_of_lines_of_context,
File "/home/alex/Python/lib/python3.10/site-packages/IPython/core/ultratb.py", line 804, in format_exception_as_a_whole
frames.append(self.format_record(r))
File "/home/alex/Python/lib/python3.10/site-packages/IPython/core/ultratb.py", line 723, in format_record
result += ''.join(_format_traceback_lines(frame_info.lines, Colors, self.has_colors, lvals))
File "/home/alex/Python/lib/python3.10/site-packages/stack_data/utils.py", line 145, in cached_property_wrapper
value = obj.__dict__[self.func.__name__] = self.func(obj)
File "/home/alex/Python/lib/python3.10/site-packages/stack_data/core.py", line 698, in lines
pieces = self.included_pieces
File "/home/alex/Python/lib/python3.10/site-packages/stack_data/utils.py", line 145, in cached_property_wrapper
value = obj.__dict__[self.func.__name__] = self.func(obj)
File "/home/alex/Python/lib/python3.10/site-packages/stack_data/core.py", line 649, in included_pieces
pos = scope_pieces.index(self.executing_piece)
File "/home/alex/Python/lib/python3.10/site-packages/stack_data/utils.py", line 145, in cached_property_wrapper
value = obj.__dict__[self.func.__name__] = self.func(obj)
File "/home/alex/Python/lib/python3.10/site-packages/stack_data/core.py", line 628, in executing_piece
return only(
File "/home/alex/Python/lib/python3.10/site-packages/executing/executing.py", line 164, in only
raise NotOneValueFound('Expected one value, found 0')
executing.executing.NotOneValueFound: Expected one value, found 0
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/alex/Python/lib/python3.10/site-packages/IPython/core/interactiveshell.py", line 1979, in showtraceback
stb = value._render_traceback_()
AttributeError: 'NotOneValueFound' object has no attribute '_render_traceback_'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/alex/Python/lib/python3.10/site-packages/IPython/core/interactiveshell.py", line 2900, in _run_cell
return runner(coro)
File "/home/alex/Python/lib/python3.10/site-packages/IPython/core/async_helpers.py", line 129, in _pseudo_sync_runner
coro.send(None)
File "/home/alex/Python/lib/python3.10/site-packages/IPython/core/interactiveshell.py", line 3098, in run_cell_async
has_raised = await self.run_ast_nodes(code_ast.body, cell_name,
File "/home/alex/Python/lib/python3.10/site-packages/IPython/core/interactiveshell.py", line 3320, in run_ast_nodes
self.showtraceback()
File "/home/alex/Python/lib/python3.10/site-packages/IPython/core/interactiveshell.py", line 1981, in showtraceback
stb = self.InteractiveTB.structured_traceback(etype,
File "/home/alex/Python/lib/python3.10/site-packages/IPython/core/ultratb.py", line 1105, in structured_traceback
return FormattedTB.structured_traceback(
File "/home/alex/Python/lib/python3.10/site-packages/IPython/core/ultratb.py", line 999, in structured_traceback
return VerboseTB.structured_traceback(
File "/home/alex/Python/lib/python3.10/site-packages/IPython/core/ultratb.py", line 871, in structured_traceback
formatted_exceptions += self.format_exception_as_a_whole(etype, evalue, etb, lines_of_context,
File "/home/alex/Python/lib/python3.10/site-packages/IPython/core/ultratb.py", line 804, in format_exception_as_a_whole
frames.append(self.format_record(r))
File "/home/alex/Python/lib/python3.10/site-packages/IPython/core/ultratb.py", line 723, in format_record
result += ''.join(_format_traceback_lines(frame_info.lines, Colors, self.has_colors, lvals))
File "/home/alex/Python/lib/python3.10/site-packages/stack_data/utils.py", line 145, in cached_property_wrapper
value = obj.__dict__[self.func.__name__] = self.func(obj)
File "/home/alex/Python/lib/python3.10/site-packages/stack_data/core.py", line 698, in lines
pieces = self.included_pieces
File "/home/alex/Python/lib/python3.10/site-packages/stack_data/utils.py", line 145, in cached_property_wrapper
value = obj.__dict__[self.func.__name__] = self.func(obj)
File "/home/alex/Python/lib/python3.10/site-packages/stack_data/core.py", line 649, in included_pieces
pos = scope_pieces.index(self.executing_piece)
File "/home/alex/Python/lib/python3.10/site-packages/stack_data/utils.py", line 145, in cached_property_wrapper
value = obj.__dict__[self.func.__name__] = self.func(obj)
File "/home/alex/Python/lib/python3.10/site-packages/stack_data/core.py", line 628, in executing_piece
return only(
File "/home/alex/Python/lib/python3.10/site-packages/executing/executing.py", line 164, in only
raise NotOneValueFound('Expected one value, found 0')
executing.executing.NotOneValueFound: Expected one value, found 0
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/alex/Python/lib/python3.10/site-packages/IPython/core/interactiveshell.py", line 1979, in showtraceback
stb = value._render_traceback_()
AttributeError: 'NotOneValueFound' object has no attribute '_render_traceback_'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/alex/Python/bin/ipython3", line 8, in <module>
sys.exit(start_ipython())
File "/home/alex/Python/lib/python3.10/site-packages/IPython/__init__.py", line 123, in start_ipython
return launch_new_instance(argv=argv, **kwargs)
File "/home/alex/Python/lib/python3.10/site-packages/traitlets/config/application.py", line 846, in launch_instance
app.start()
File "/home/alex/Python/lib/python3.10/site-packages/IPython/terminal/ipapp.py", line 318, in start
self.shell.mainloop()
File "/home/alex/Python/lib/python3.10/site-packages/IPython/terminal/interactiveshell.py", line 653, in mainloop
self.interact()
File "/home/alex/Python/lib/python3.10/site-packages/IPython/terminal/interactiveshell.py", line 646, in interact
self.run_cell(code, store_history=True)
File "/home/alex/Python/lib/python3.10/site-packages/IPython/core/interactiveshell.py", line 2854, in run_cell
result = self._run_cell(
File "/home/alex/Python/lib/python3.10/site-packages/IPython/core/interactiveshell.py", line 2905, in _run_cell
self.showtraceback(running_compiled_code=True)
File "/home/alex/Python/lib/python3.10/site-packages/IPython/core/interactiveshell.py", line 1981, in showtraceback
stb = self.InteractiveTB.structured_traceback(etype,
File "/home/alex/Python/lib/python3.10/site-packages/IPython/core/ultratb.py", line 1105, in structured_traceback
return FormattedTB.structured_traceback(
File "/home/alex/Python/lib/python3.10/site-packages/IPython/core/ultratb.py", line 999, in structured_traceback
return VerboseTB.structured_traceback(
File "/home/alex/Python/lib/python3.10/site-packages/IPython/core/ultratb.py", line 871, in structured_traceback
formatted_exceptions += self.format_exception_as_a_whole(etype, evalue, etb, lines_of_context,
File "/home/alex/Python/lib/python3.10/site-packages/IPython/core/ultratb.py", line 804, in format_exception_as_a_whole
frames.append(self.format_record(r))
File "/home/alex/Python/lib/python3.10/site-packages/IPython/core/ultratb.py", line 723, in format_record
result += ''.join(_format_traceback_lines(frame_info.lines, Colors, self.has_colors, lvals))
File "/home/alex/Python/lib/python3.10/site-packages/stack_data/utils.py", line 145, in cached_property_wrapper
value = obj.__dict__[self.func.__name__] = self.func(obj)
File "/home/alex/Python/lib/python3.10/site-packages/stack_data/core.py", line 698, in lines
pieces = self.included_pieces
File "/home/alex/Python/lib/python3.10/site-packages/stack_data/utils.py", line 145, in cached_property_wrapper
value = obj.__dict__[self.func.__name__] = self.func(obj)
File "/home/alex/Python/lib/python3.10/site-packages/stack_data/core.py", line 649, in included_pieces
pos = scope_pieces.index(self.executing_piece)
File "/home/alex/Python/lib/python3.10/site-packages/stack_data/utils.py", line 145, in cached_property_wrapper
value = obj.__dict__[self.func.__name__] = self.func(obj)
File "/home/alex/Python/lib/python3.10/site-packages/stack_data/core.py", line 628, in executing_piece
return only(
File "/home/alex/Python/lib/python3.10/site-packages/executing/executing.py", line 164, in only
raise NotOneValueFound('Expected one value, found 0')
executing.executing.NotOneValueFound: Expected one value, found 0