#21776 [NEW]: Heisenbug after database code changes.

From: Date: Mon, 20 Jan 2003 16:31:29 +0000
Subject: #21776 [NEW]: Heisenbug after database code changes.
Groups: php.bugs 
Request: Send a blank email to php-bugs+get-30679@lists.php.net to get a copy of this message 
From:             marcus@wordtracker.com
Operating system: Windows and Linux
PHP version:      4.2.3
PHP Bug Type:     Unknown/Other Function
Bug description:  Heisenbug after database code changes.

This is the bug from hell.

It is random crashing in a section of our unit tests. On Windows the crash
manifests itself as...

The instruction "(1)" referenced memory at "(2)" which is not writable
where (1) is :0x77fcb9b1 (once), 0x77fcb892 (twice), 0x77fcb9fb (once) on
a random attempt of two dozen tries.

There is too much code to post here and we cannot yet isolate it - our
individual unit tests all pass. We are working on a backtrace from a Linux
machine and will add to this bug soon.

The code that was changed that started generating these problems was mysql
related. There are a lot of references in that code (it is a persistent
object library).

The problem manifests itself in Linux with random fatal errors such as
unknown function where the function name is simply "<()" !? It also
happens both with version 3 and 4 of  MySQL and versions 4.2.3 and 4.3.0
of PHP.

It is a complete show stopper.

yours, Marcus.

-- 
Edit bug report at http://bugs.php.net/?id=21776&edit=1
-- 
Try a CVS snapshot:         http://bugs.php.net/fix.php?id=21776&r=trysnapshot
Fixed in CVS:               http://bugs.php.net/fix.php?id=21776&r=fixedcvs
Fixed in release:           http://bugs.php.net/fix.php?id=21776&r=alreadyfixed
Need backtrace:             http://bugs.php.net/fix.php?id=21776&r=needtrace
Try newer version:          http://bugs.php.net/fix.php?id=21776&r=oldversion
Not developer issue:        http://bugs.php.net/fix.php?id=21776&r=support
Expected behavior:          http://bugs.php.net/fix.php?id=21776&r=notwrong
Not enough info:            http://bugs.php.net/fix.php?id=21776&r=notenoughinfo
Submitted twice:            http://bugs.php.net/fix.php?id=21776&r=submittedtwice
register_globals:           http://bugs.php.net/fix.php?id=21776&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=21776&r=php3
Daylight Savings:           http://bugs.php.net/fix.php?id=21776&r=dst
IIS Stability:              http://bugs.php.net/fix.php?id=21776&r=isapi
Install GNU Sed:            http://bugs.php.net/fix.php?id=21776&r=gnused

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