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Bug #46236 Negative integer overflow handled incorrectly
Submitted: 2008-10-05 11:22 UTC Modified: 2008-11-19 01:00 UTC
Votes:2
Avg. Score:4.0 ± 1.0
Reproduced:2 of 2 (100.0%)
Same Version:1 (50.0%)
Same OS:1 (50.0%)
From: wlalk at wtfs dot za dot net Assigned: tony2001 (profile)
Status: No Feedback Package: Scripting Engine problem
PHP Version: 5.2.6 OS: Linux (2.6.18)
Private report: No CVE-ID: None
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 [2008-10-05 11:22 UTC] wlalk at wtfs dot za dot net 
Description:
------------
Large negative integer not overflowing correctly.

Same problem as Bug #38908 but with version 5.2.6.

Bug #38908 claims to have been fixed as of 26 September 2006.

Reproduce code:
---------------
echo (int)(-2432869008);
echo (int)(2432869008);

Expected result:
----------------
1862098288
-1862098288 

Output as generated by a windows based server.

Actual result:
--------------
-2147483648
-1862098288 

Output as generated by a linux based server.

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 [2008-11-10 20:24 UTC] jani@php.net 
Antony, your fix was not enough?
 [2008-11-11 08:42 UTC] tony2001@php.net 
Cannot reproduce anything like that.
And I don't have 32bit machine for tests.

#php -r 'var_dump((int)(-PHP_INT_MAX - 10));'
int(-9223372036854775808)
#php -v
PHP 5.2.7RC3-dev (cli) (built: Oct 31 2008 19:06:58) (DEBUG)
 [2008-11-19 01:00 UTC] php-bugs at lists dot php dot net 
No feedback was provided for this bug for over a week, so it is
being suspended automatically. If you are able to provide the
information that was originally requested, please do so and change
the status of the bug back to "Open".
 
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