[Python-bugs-list] [ python-Bugs-667147 ] Segmentation fault printing str subclass

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Bugs item #667147, was opened at 2003-01-13 08:25
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https://sourceforge.net/tracker/?func=detail&atid=105470&aid=667147&group_id=5470

Category: Type/class unification
Group: Python 2.2
Status: Open
Resolution: None
>Priority: 7
Submitted By: James Henderson (henderj)
Assigned to: Nobody/Anonymous (nobody)
Summary: Segmentation fault printing str subclass

Initial Comment:
If I define a subclass of the built-in type str as
follows:

class Letter(str):
    def __new__(cls, letter):
        if letter == 'EPS':
            return str.__new__(cls)
        return str.__new__(cls, letter)
    def __str__(self):
        if not self:
            return 'EPS'
        return self

then the following produces a segmentation fault:

>>> w = Letter('w')
>>> print w

I realize that the last line of the class definition
should be:

return str.__str__(self)

but what I tried should still not cause a crash.  I am
running Red Hat Linux 7.1 and I have got the same
behaviour on Python 2.2, Python 2.2.2 and Python 2.3a0.

James

----------------------------------------------------------------------

>Comment By: Neal Norwitz (nnorwitz)
Date: 2003-01-13 08:51

Message:
Logged In: YES 
user_id=33168

Ouch!  This affects both 2.2.2 and 2.3.

----------------------------------------------------------------------

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