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Comparison of two ints returns wrong result #48560

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kbrandt mannequin opened this issue Nov 12, 2008 · 2 comments
Closed

Comparison of two ints returns wrong result #48560

kbrandt mannequin opened this issue Nov 12, 2008 · 2 comments
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type-bug An unexpected behavior, bug, or error

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@kbrandt
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kbrandt mannequin commented Nov 12, 2008

BPO 4310
Nosy @mdickinson
Files
  • id_11-2.py: The Code that doesn't work correctly
    		•

    Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.

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    GitHub fields:

    assignee = None
closed_at = <Date 2008-11-12.21:26:54.513>
created_at = <Date 2008-11-12.21:07:24.870>
labels = ['type-bug', 'invalid']
title = 'Comparison of two ints returns wrong result'
updated_at = <Date 2008-11-12.21:26:54.504>
user = 'https://bugs.python.org/kbrandt'

    bugs.python.org fields:

    activity = <Date 2008-11-12.21:26:54.504>
actor = 'mark.dickinson'
assignee = 'none'
closed = True
closed_date = <Date 2008-11-12.21:26:54.513>
closer = 'mark.dickinson'
components = []
creation = <Date 2008-11-12.21:07:24.870>
creator = 'kbrandt'
dependencies = []
files = ['11996']
hgrepos = []
issue_num = 4310
keywords = []
message_count = 2.0
messages = ['75794', '75798']
nosy_count = 2.0
nosy_names = ['mark.dickinson', 'kbrandt']
pr_nums = []
priority = 'normal'
resolution = 'not a bug'
stage = None
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue4310'
versions = ['Python 2.5']
    @kbrandt
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    kbrandt mannequin commented Nov 12, 2008

    The attached program returns a false result on one of my computers with
    a Intel(R) Core(TM)2 CPU 6600 @ 2.40GHz processor. Is seems the
    comparison of two int does not perform correctly. I have python 2.5.2
    and 2.6.27-7-generic kernel.

    The lines of interest are 89-71:

    print type(f_p),type(largest),f_p,largest
    if f_p > largest:
    print 'foo'
    largest = f_p

    When running this code:
    # python id_11-2.py | grep 70600
    <type 'int'> <type 'int'> 70600674 51267216
    # python id_11-2.py | grep foo #doesn't return anything

    When I run the same code on another machine the end result of the
    program is 70600674, whereas my current machine the end result is
    51267216.

    @kbrandt kbrandt mannequin added the type-bug An unexpected behavior, bug, or error label Nov 12, 2008
    @mdickinson
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    You're mixing tabs and spaces in your code.

    The 'if f_p > largest' line occurs one indentation level further out
    than the preceding print.

    @ezio-melotti ezio-melotti transferred this issue from another repository Apr 10, 2022
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