ID: 41633
Updated by: [EMAIL PROTECTED]
Reported By: m dot stach at ewerk dot com
Status: Open
Bug Type: Reproducible crash
Operating System: Windows/MacOSX
PHP Version: 5.2.3
New Comment:
Just checking same constant wouldn't help since you could have:
const self::FOO = self::BAR;
const self::BAR = self::FOO;
but we can try and look into how to detect looping and either limit the
depth or just break the loop one way or another.
Previous Comments:
------------------------------------------------------------------------
[2007-06-08 22:00:48] judas dot iscariote at gmail dot com
This is the expected behaviuor, as your code produced infinite
recursion FOO = self::FOO -> FOO = self::FOO -> FOO = self::FOO and the
interpreter ends crashing ( as expected)
However I suspect in this particular case, something can be done to
avoid this, maybe zval_update_constant_ex() can check if we ar trying to
assign a constant to the same constant and emit a nice fatal error, not
sure..though.
------------------------------------------------------------------------
[2007-06-08 13:38:29] m dot stach at ewerk dot com
Sorry, the expected result I specified was wrong.
Expected Result
---------------
I would expect error message (parse, compile or runtime/fatal error).
------------------------------------------------------------------------
[2007-06-08 13:35:19] m dot stach at ewerk dot com
Description:
------------
When instantiating classes with self-referencing constants PHP
crashes.
It is reproducable on Windows (5.2.3), Mac (5.2.2) and Linux (5.2.0).
Reproduce code:
---------------
class b {
const FOO = self::FOO;
}
new b();
echo "1";
Expected result:
----------------
1
Actual result:
--------------
No output, segmentation fault instead. Since I don't have MSVC
available for backtrace, I tried on a mac and linux box, same result
(but Versions were 5.2.2 and 5.2.0).
Looks like an endless recursion.
Crash-Report:
Date/Time: 2007-06-08 14:55:00.261 +0200
OS Version: 10.4.9 (Build 8P135)
Report Version: 4
Command: php
Path: /usr/local/bin/php
Parent: bash [7590]
Version: ??? (???)
PID: 7604
Thread: 0
Exception: EXC_BAD_ACCESS (0x0001)
Codes: KERN_INVALID_ADDRESS (0x0001) at 0xbf7ffff0
Thread 0 Crashed:
0 php 0x004ae698 _zend_mm_alloc_int + 12
1 php 0x004afd48 _emalloc + 100
2 php 0x004b0410 _estrndup + 44
3 php 0x004c158c zend_get_constant_ex + 256
4 php 0x004c3470 zval_update_constant_ex + 340
5 php 0x004c3ca8 zval_update_constant + 44
6 php 0x004c171c zend_get_constant_ex + 656
lines 4-6 repeated
506 php 0x004c3ca8 zval_update_constant + 44
507 php 0x004c171c zend_get_constant_ex + 656
508 php 0x004c3470 zval_update_constant_ex + 340
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=41633&edit=1
