Edit report at https://bugs.php.net/bug.php?id=61998&edit=1
ID: 61998
Updated by: fel...@php.net
Reported by: rbarbosa at revelex dot com
Summary: Using traits with method aliases appears to result
in crash during execution.
-Status: Open
+Status: Feedback
Type: Bug
Package: Reproducible crash
Operating System: Redhat Linux - Kernel 2.6.18
PHP Version: 5.4.3
Block user comment: N
Private report: N
New Comment:
Thank you for this bug report. To properly diagnose the problem, we
need a short but complete example script to be able to reproduce
this bug ourselves.
A proper reproducing script starts with <?php and ends with ?>,
is max. 10-20 lines long and does not require any external
resources such as databases, etc. If the script requires a
database to demonstrate the issue, please make sure it creates
all necessary tables, stored procedures etc.
Please avoid embedding huge scripts into the report.
Previous Comments:
------------------------------------------------------------------------
[2012-05-10 16:02:14] rbarbosa at revelex dot com
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.
------------------------------------------------------------------------
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Edit this bug report at https://bugs.php.net/bug.php?id=61998&edit=1
