[Python-bugs-list] [ python-Bugs-428342 ] [IRIX] crash on int->float conversio

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Bugs item #428342, was updated on 2001-05-29 09:01
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Category: Python Interpreter Core
Group: Platform-specific
Status: Open
Resolution: None
Priority: 5
Submitted By: Charles Schwieters (chuckorama)
Assigned to: Nobody/Anonymous (nobody)
Summary: [IRIX] crash on int->float conversio

Initial Comment:
here is a snippet from a python session running on
IRIX 6.5.11m, compiled with the native compiler

% python
Python 2.1 (#3, May 29 2001, 10:15:29) [C] on irix646
>>> amin = 0; a=1.0; Na=10
>>> xmin = amin * a / Na
Bus error (core dumped)

I also had this problem with version 2.1b2. 

It works fine if I explicitly change the integers to
floats

it runs fine on Linux and Solaris platforms.

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>Comment By: Charles Schwieters (chuckorama)
Date: 2001-05-30 06:07

Message:
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You are so right. Compiling floatobject.c -O1 removes the
problem. (all others use the default -O -OPT:Olimit=0)
The optimizer seems to muck up the call to convert_to_double
in the CONVERT_TO_DOUBLE macro. Suggestions on where to go
from here?

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Comment By: Tim Peters (tim_one)
Date: 2001-05-29 21:24

Message:
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First thing to try with any problem on IRIX is to recompile 
Python with optimization turned off.  That's usually all 
there is to it.  Then, if that fixes it and you feel like 
it, you can play binary search to determine which file 
optimization is breaking (floatobject.c would be my first 
guess).

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http://sourceforge.net/tracker/?func=detail&atid=105470&aid=428342&group_id=5470