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Bug #28829 empty parameters cause crash
Submitted: 2004-06-18 14:36 UTC Modified: 2004-07-14 02:16 UTC
Votes:2
Avg. Score:4.5 ± 0.5
Reproduced:2 of 2 (100.0%)
Same Version:1 (50.0%)
Same OS:0 (0.0%)
From: rashid at ds dot pg dot gda dot pl Assigned:
Status: Closed Package: BC math related
PHP Version: 5CVS-2004-06-18 (dev) OS: win 2k3
Private report: No CVE-ID: None
View Developer Edit
 [2004-06-18 14:36 UTC] rashid at ds dot pg dot gda dot pl 
Description:
------------
description in http://bugs.php.net/bug.php?id=27759 describes the problem well. there is also the same problem with bcsub. its reported again because the bug is still present in latest cvs build.

Reproduce code:
---------------
PEAR`s Benchmark_Timer::getProfiling():
//... this is part of loop - first settings of parameters are empty, and apache throws exception right away
$diff  = bcsub($time, $temp, 6);
$total = bcadd($total, $diff, 6);  
//...

Actual result:
--------------
apache exception ['memory cannot be read']

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 [2004-06-28 01:19 UTC] rashid at ds dot pg dot gda dot pl 
some more precise info
in above example: $total = $temp = 0

i tried other settings:
$total = $temp = '0' still caused error.
$total = $temp = '0.0' worked fine

hope this info helps - it looks like some kind of variable type conversion problems
 [2004-07-13 22:41 UTC] chris at leftbrained dot org 
I'm still experiencing this issue, exactly as described, using a build from this mornings CVS.

I'm using Apache2 and Windows 2k Pro, with PHP compiled as a module, and lib_mysql and lib_mysqli in use.

I'm available for any tests that might be necessary, though I'm not comfortable compiling PHP on Windows.
 [2004-07-14 02:16 UTC] pollita@php.net 
This bug has been fixed in CVS.

Snapshots of the sources are packaged every three hours; this change
will be in the next snapshot. You can grab the snapshot at
http://snaps.php.net/.
 
Thank you for the report, and for helping us make PHP better.
 
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