[ python-Bugs-1019129 ] "rich comparison'' methods hide stack overflow

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Bugs item #1019129, was opened at 2004-08-30 11:01
Message generated for change (Comment added) made by tim_one
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Category: Python Interpreter Core
Group: Python 2.3
Status: Closed
Resolution: Wont Fix
Priority: 5
Submitted By: boyanb (boyanb)
Assigned to: Nobody/Anonymous (nobody)
Summary: "rich comparison'' methods hide stack overflow

Initial Comment:
I've tried the code below for both 2.2.2 and  2.3.2 

>>> class DontCare(str):
...   def __eq__(self, other):
...     # stack overflow expected!
...     return self == other
...
...
>>> print (DontCare("1") == "2")
1


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>Comment By: Tim Peters (tim_one)
Date: 2004-09-06 23:29

Message:
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Just nothing that this was still thought to be "a feature" in 
2.3.  NEWS for 2.4a1 contained:

"""
- Python no longer tries to be smart about recursive 
comparisons.  When comparing containers with cyclic 
references to themselves it  will now just hit the recursion 
limit.  See SF patch 825639.
"""

More info can be found by looking at the patch, and the bug 
reports it addressed.

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Comment By: Raymond Hettinger (rhettinger)
Date: 2004-09-06 23:18

Message:
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user_id=80475

Armin fixed this for Py2.4.

It is a behaviour change that may affect existing, working
code, so it was not backported.

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Comment By: Brett Cannon (bcannon)
Date: 2004-09-06 23:15

Message:
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user_id=357491

This problem does not exist in 2.4 but seems to still be in 2.3 CVS.

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