[issue34779] IDLE internals show up in tracebacks when returning objects that cannot be `repr`ed

[ppperry]

New submission from ppperry <mapreader at olum.org>:

>>> class NoRepr:
	def __repr__(self):
		raise ValueError
>>> NoRepr()
Traceback (most recent call last):
  File "<pyshell#44>", line 1, in <module>
    NoRepr()
  File "C:\Program Files\Python37\lib\idlelib\rpc.py", line 617, in displayhook
    text = repr(value)
  File "<pyshell#43>", line 3, in __repr__
    raise ValueError
ValueError

What should happen in this case isn't exactly clear, but the current traceback is wrong in multiple ways.

----------
assignee: terry.reedy
components: IDLE
messages: 326172
nosy: ppperry, terry.reedy
priority: normal
severity: normal
status: open
title: IDLE internals show up in tracebacks when returning objects that cannot be `repr`ed
versions: Python 3.6, Python 3.7, Python 3.8

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue34779>
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