New submission from Steve Stagg <stest...@gmail.com>:
This was raised by Mats Wichmann <m...@python.org> on the python-dev list.
Commit : c71581c7a4192e6ba9a79eccc583aaadab300efa
bpo-42615: Delete redundant jump instructions that only bypass empty blocks
(GH-23733)
appears to have changed the behaviour of the following code:
class B:
def __bool__(self):
raise AttributeError("don't do that!")
b = B()
try:
if b:
pass
except AttributeError:
print("HI")
Before the change, the output is:
bool(B)
GOT ERROR
Traceback (most recent call last):
File "../test.py", line 8, in <module>
if b:
File "../test.py", line 4, in __bool__
raise AttributeError("don't do that!")
AttributeError: don't do that!
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "../test.py", line 12, in <module>
raise IndexError("Should GET THIS")
IndexError: Should GET THIS
After the change, just:
SHOULDN'T GET THIS
It seems like the entire branch is being eliminated prematurely, but maybe only
when the statement is wrapped in a try-except?
----------
messages: 384867
nosy: Mark.Shannon, m, stestagg
priority: normal
severity: normal
status: open
title: Possible regression introduced by bpo-42615
type: behavior
versions: Python 3.10
_______________________________________
Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue42899>
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