python3.8.3/traceback.py:312, AttributeError: 'KeyError' object has no attribute 'tb_frame'

[abaelhe]

BPO	41612
Nosy	@abaelhe

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2020-08-22.05:50:20.594>
created_at = <Date 2020-08-22.05:30:15.720>
labels = ['3.8', 'type-bug', 'library']
title = "python3.8.3/traceback.py:312, AttributeError: 'KeyError' object has no attribute 'tb_frame'"
updated_at = <Date 2020-08-22.05:50:20.592>
user = 'https://github.com/abaelhe'

bugs.python.org fields:

activity = <Date 2020-08-22.05:50:20.592>
actor = 'abaelhe'
assignee = 'none'
closed = True
closed_date = <Date 2020-08-22.05:50:20.594>
closer = 'abaelhe'
components = ['Library (Lib)']
creation = <Date 2020-08-22.05:30:15.720>
creator = 'abaelhe'
dependencies = []
files = []
hgrepos = []
issue_num = 41612
keywords = []
message_count = 2.0
messages = ['375783', '375784']
nosy_count = 1.0
nosy_names = ['abaelhe']
pr_nums = []
priority = 'normal'
resolution = 'third party'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue41612'
versions = ['Python 3.8']

[abaelhe]

/opt/conda/lib/python3.8/site-packages/prompt_toolkit/shortcuts/prompt.py in prompt(self, message, editing_mode, refresh_interval, vi_mode, lexer, completer, complete_in_thread, is_password, key_bindings, bottom_toolbar, style, color_depth, include_default_pygments_style, style_transformation, swap_light_and_dark_colors, rprompt, multiline, prompt_continuation, wrap_lines, enable_history_search, search_ignore_case, complete_while_typing, validate_while_typing, complete_style, auto_suggest, validator, clipboard, mouse_support, input_processors, reserve_space_for_menu, enable_system_prompt, enable_suspend, enable_open_in_editor, tempfile_suffix, tempfile, default, accept_default, pre_run, set_exception_handler)
992 return get_event_loop().run_until_complete(self._dumb_prompt(self.message))
993
--> 994 return self.app.run(set_exception_handler=set_exception_handler)
995
996 async def _dumb_prompt(self, message: AnyFormattedText = "") -> _T:

/opt/conda/lib/python3.8/site-packages/prompt_toolkit/application/application.py in run(self, pre_run, set_exception_handler)
809 set_event_loop(loop)
810
--> 811 return loop.run_until_complete(
812 self.run_async(pre_run=pre_run, set_exception_handler=set_exception_handler)
813 )

/opt/conda/lib/python3.8/asyncio/base_events.py in run_until_complete(self, future)
614 raise RuntimeError('Event loop stopped before Future completed.')
615
--> 616 return future.result()
617
618 def stop(self):

/opt/conda/lib/python3.8/site-packages/prompt_toolkit/application/application.py in run_async(self, pre_run, set_exception_handler)
776 loop.set_exception_handler(previous_exc_handler)
777
--> 778 return await _run_async2()
779
780 def run(

/opt/conda/lib/python3.8/site-packages/prompt_toolkit/application/application.py in _run_async2()
764 # KeyboardInterrupt, we still want to wait for the
765 # background tasks.
--> 766 await self.cancel_and_wait_for_background_tasks()
767
768 # Set the _is_running flag to False. Normally this

/opt/conda/lib/python3.8/site-packages/prompt_toolkit/application/application.py in cancel_and_wait_for_background_tasks(self)
865 for task in self.background_tasks:
866 try:
--> 867 await task
868 except CancelledError:
869 pass

/opt/conda/lib/python3.8/site-packages/prompt_toolkit/buffer.py in new_coroutine(*a, **kw)
1852 while True:
1853 try:
-> 1854 await coroutine(*a, **kw)
1855 except _Retry:
1856 continue

/opt/conda/lib/python3.8/site-packages/prompt_toolkit/buffer.py in async_completer(select_first, select_last, insert_common_part, complete_event)
1681 return self.complete_state == complete_state
1682
-> 1683 async for completion in self.completer.get_completions_async(
1684 document, complete_event
1685 ):

/opt/conda/lib/python3.8/site-packages/prompt_toolkit/completion/base.py in get_completions_async(self, document, complete_event)
267 completer = self.get_completer() or DummyCompleter()
268
--> 269 async for completion in completer.get_completions_async(
270 document, complete_event
271 ):

/opt/conda/lib/python3.8/site-packages/prompt_toolkit/completion/base.py in get_completions_async(self, document, complete_event)
194 Asynchronous generator of :class:`.Completion` objects.
195 """
--> 196 for item in self.get_completions(document, complete_event):
197 yield item
198

/opt/conda/lib/python3.8/site-packages/IPython/terminal/ptutils.py in get_completions(self, document, complete_event)
114 except Exception as e:
115 from traceback import print_tb
--> 116 print_tb(e)
117
118 @staticmethod

/opt/conda/lib/python3.8/traceback.py in print_tb(tb, limit, file)
51 method.
52 """
---> 53 print_list(extract_tb(tb, limit=limit), file=file)
54
55 def format_tb(tb, limit=None):

/opt/conda/lib/python3.8/traceback.py in extract_tb(tb, limit)
70 whitespace stripped; if the source is not available it is None.
71 """
---> 72 return StackSummary.extract(walk_tb(tb), limit=limit)
73
74 #

/opt/conda/lib/python3.8/traceback.py in extract(klass, frame_gen, limit, lookup_lines, capture_locals)
345 result = klass()
346 fnames = set()
--> 347 for f, lineno in frame_gen:
348 co = f.f_code
349 filename = co.co_filename

/opt/conda/lib/python3.8/traceback.py in walk_tb(tb)
310 """
311 while tb is not None:
--> 312 yield tb.tb_frame, tb.tb_lineno
313 tb = tb.tb_next
314

AttributeError: 'KeyError' object has no attribute 'tb_frame'

[abaelhe]

This is a bug caused by IPython:

/opt/conda/lib/python3.8/site-packages/IPython/terminal/ptutils.py in get_completions(self, document, complete_event)
114 except Exception as e:
115 from traceback import print_tb
--> 116 print_tb(e)
117
118 @staticmethod

######################################################################
# Simulation investigation for above KeyError:
In [3]: def fun():
...: try:
...: s = {}
...: k = s['0']
...: except Exception as e:
...: import sys
...: from traceback import print_tb
...: exc_type, exc_value, exc_traceback = sys.exc_info()
...: print_tb(exc_traceback)
...:

In [4]: fun()
File "<ipython-input-3-d3df30294ed8>", line 4, in fun
k = s['0']