[New-bugs-announce] [issue42632] Reassgining ZeroDivisionError will lead to bug in Except clause

[Xinmeng Xia]

New submission from Xinmeng Xia <xiaxm at smail.nju.edu.cn>:

Running the following program:
==============================
def foo():
    try:
        1/0
    except ZeroDivisionError as e:
       	ZeroDivisionError = 1
foo()
==============================
The expected output should be nothing. ZeroDivisionError is caught and then reassignment is executed. However, running this program in Python3.10 will lead to the following error: 

Traceback (most recent call last):
  File "/home/xxm/Desktop/nameChanging/error/1.py", line 5, in foo
    1/0
ZeroDivisionError: division by zero

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/xxm/Desktop/nameChanging/error/1.py", line 8, in <module>
    foo()
  File "/home/xxm/Desktop/nameChanging/error/1.py", line 6, in foo
    except Exception as e:
UnboundLocalError: local variable 'Exception' referenced before assignment

----------
components: Interpreter Core
messages: 382953
nosy: xxm
priority: normal
severity: normal
status: open
title: Reassgining ZeroDivisionError will lead to bug in Except clause
type: compile error
versions: Python 3.10

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue42632>
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