From:
Operating system: Redhat Linux - Kernel 2.6.18
PHP version: 5.4.3
Package: Reproducible crash
Bug Type: Bug
Bug description:Using traits with method aliases appears to result in crash
during execution.
Description:
------------
During testing in out application under development we began experiencing
crashes in the PHP module with an error indicating "zend_mm_heap
corrupted."
As this was occurring in a larger application, we noticed it did not begin
occurring until we include method aliases in a trait we'd written.
We loaded a debug build of PHP 5.4.3 and observed the following error
message:
[Thu May 10 10:46:13 2012] Script:
'/home/xxxxxxx/public_html/www/app/portal.rvlx'
---------------------------------------
/opt/src/apache2.2/php-5.4.3/Zend/zend_opcode.c(235) : Block 0x09ef4914
status:
Invalid pointer: ((size=0x00000038) != (next.prev=0x00000420))
---------------------------------------
We then developed a small sandbox test which included a simple script with
a trait with method a alias. This did not yield the same error message, but
it did indicate a failure with the same line of code, zend_opcode.c:235. It
also referenced another file with a different error:
[Thu May 10 11:16:36 2012] Script:
'/home/xxxxxxx/public_html/www/sites/traitBug/trait_bug_test.php'
Zend/zend_language_scanner.l(1889) : Freeing 0xB7EFAFD4 (12 bytes),
script=/home/crussell/public_html/www/sites/traitBug/trait_bug_test.php
=== Total 1 memory leaks detected ===
[Thu May 10 11:16:36 2012] Script:
'/home/xxxxxxx/public_html/www/sites/traitBug/trait_bug_test.php'
---------------------------------------
/opt/src/apache2.2/php-5.4.3/Zend/zend_opcode.c(235) : Block 0xb7ef87d4
status:
Beginning: Cached
Freed (invalid)
Start: OK
End: OK
---------------------------------------
Two adjustments to the scripts would clear this error. Either eliminating
the use of the autoloader and performing a "require_once" statement in the
code, or eliminating the method alias. Either of those 2 actions eliminates
this error from our logs.
Both trait method aliasing and autoloader functionality are vital to our
application, so we're eager to see this issue resolved.
When executed in our application, this error results in immediate closure
of the apache connection and a zero length response.
Test script:
---------------
I do not have a test script, but I do have a zip file with a directory
containing the trait files and executable PHP code to replicate this
issue.
Please contact me at my email address rbarb...@revelex.com, when the bug
has been assigned and I will send you the archive with test scripts.
Expected result:
----------------
Expectation is that the script would execute without any errors in the
apache logs.
Actual result:
--------------
See the bug description.
--
Edit bug report at https://bugs.php.net/bug.php?id=61998&edit=1
--
Try a snapshot (PHP 5.4):
https://bugs.php.net/fix.php?id=61998&r=trysnapshot54
Try a snapshot (PHP 5.3):
https://bugs.php.net/fix.php?id=61998&r=trysnapshot53
Try a snapshot (trunk):
https://bugs.php.net/fix.php?id=61998&r=trysnapshottrunk
Fixed in SVN:
https://bugs.php.net/fix.php?id=61998&r=fixed
Fixed in SVN and need be documented:
https://bugs.php.net/fix.php?id=61998&r=needdocs
Fixed in release:
https://bugs.php.net/fix.php?id=61998&r=alreadyfixed
Need backtrace:
https://bugs.php.net/fix.php?id=61998&r=needtrace
Need Reproduce Script:
https://bugs.php.net/fix.php?id=61998&r=needscript
Try newer version:
https://bugs.php.net/fix.php?id=61998&r=oldversion
Not developer issue:
https://bugs.php.net/fix.php?id=61998&r=support
Expected behavior:
https://bugs.php.net/fix.php?id=61998&r=notwrong
Not enough info:
https://bugs.php.net/fix.php?id=61998&r=notenoughinfo
Submitted twice:
https://bugs.php.net/fix.php?id=61998&r=submittedtwice
register_globals:
https://bugs.php.net/fix.php?id=61998&r=globals
PHP 4 support discontinued:
https://bugs.php.net/fix.php?id=61998&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=61998&r=dst
IIS Stability:
https://bugs.php.net/fix.php?id=61998&r=isapi
Install GNU Sed:
https://bugs.php.net/fix.php?id=61998&r=gnused
Floating point limitations:
https://bugs.php.net/fix.php?id=61998&r=float
No Zend Extensions:
https://bugs.php.net/fix.php?id=61998&r=nozend
MySQL Configuration Error:
https://bugs.php.net/fix.php?id=61998&r=mysqlcfg
