[issue11477] Incorrect operand precedence when implementing sequences in C

2021-10-25 Thread Gregory P. Smith 


Gregory P. Smith  added the comment:

Given that a lot of code is presumably relying on this (see the notes from 
2015)... I wouldn't be surprised if this turns into a wart we document but not 
actually fix. :/

Or a conditional behavior we control via a `from __future__ import 
correct_extension_operator_precedence` on a per file / per Notebook basis.

Ever actually flipping the default sounds difficult without disruption.  We'd 
need input from the community where extensions that rely on it have been 
produced and widely deployed.

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[issue11477] Incorrect operand precedence when implementing sequences in C

2021-10-25 Thread Irit Katriel 


Irit Katriel  added the comment:

Reproduced on 3.11.

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versions: +Python 3.11 -Python 3.6

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[issue11477] Incorrect operand precedence when implementing sequences in C

2016-03-07 Thread Terry J. Reedy 

Changes by Terry J. Reedy :


--
stage: needs patch -> patch review
versions: +Python 3.6 -Python 3.5

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[issue11477] Incorrect operand precedence when implementing sequences in C

2016-03-06 Thread Serhiy Storchaka 

Changes by Serhiy Storchaka :


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[issue11477] Incorrect operand precedence when implementing sequences in C

2015-07-21 Thread Ethan Furman 

Changes by Ethan Furman et...@stoneleaf.us:


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[issue11477] Incorrect operand precedence when implementing sequences in C

2015-05-16 Thread Ethan Furman 

Changes by Ethan Furman et...@stoneleaf.us:


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[issue11477] Incorrect operand precedence when implementing sequences in C

2015-05-16 Thread Nick Coghlan 

Nick Coghlan added the comment:

Nathaniel Smith pointed out on python-dev 
(https://mail.python.org/pipermail/python-dev/2015-May/140006.html) that NumPy 
is relying on this bug to implement elementwise multiplication of a list by a 
scalar array:

In [9]: [1, 2] * np.array(2)
Out[9]: array([2, 4])

He also pointed out that PyPy implemented bug-for-bug compatibility with this 
some time back: 
https://bitbucket.org/pypy/pypy/src/a1a494787f4112e42f50c6583e0fea18db3fb4fa/pypy/objspace/descroperation.py?at=default#cl-692

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[issue11477] Incorrect operand precedence when implementing sequences in C

2015-04-25 Thread Gregory P. Smith 

Changes by Gregory P. Smith g...@krypto.org:


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[issue11477] Incorrect operand precedence when implementing sequences in C

2013-01-04 Thread Nick Coghlan 

Nick Coghlan added the comment:

Updated issue title to better describe the symptoms of the issue (and hopefully 
make it so I don't spend 5 minutes remembering the issue title every time I 
want to look at it...)

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title: Bug in code dispatching based on internal slots - Incorrect operand 
precedence when implementing sequences in C

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