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Bug #23285 zendlex coredump
Submitted: 2003-04-20 05:42 UTC Modified: 2003-05-29 04:03 UTC
Avg. Score:1.0 ± 0.0
Reproduced:0 of 1 (0.0%)
From: Assigned: wez
Status: Closed Package: Scripting Engine problem
PHP Version: 4.3.3-dev OS: RH9
Private report: No CVE-ID:
 [2003-04-20 05:42 UTC]
coz the zendlex() function is recursive for some cases, it's quite easy dumping zend core.

e.g, just repeat the comments enough times on the following script (i did it 500,000 times but may less is nedded):
<? /**/ /**/ /*....... /**/ ?>

is this consider a bug?


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 [2003-05-20 19:19 UTC]
Please try using this CVS snapshot:
For Windows:

It appears recent changes have resolved this bug.
 [2003-05-21 10:15 UTC]
It still happens for me (using gcc 2.95.3)..

 [2003-05-25 06:37 UTC]
the bug still exists using gcc version 3.2.2 20030222 
here how u can easly reproduce it:

[root@moshe-lap php4]# cat ../../gen-php-seg.php
$p = fopen("tmp","wb");
for($a=0;$a<1024;$a++) $str.="/**/ ";
fwrite($p,"<? ");
for($a=0;$a<512;$a++) fwrite($p,$str);
fwrite($p," ?> ");

[root@moshe-lap php4]# ./sapi/cli/php ../../tmp
Segmentation fault

 [2003-05-28 16:39 UTC]
Try this patch:
 [2003-05-28 20:05 UTC]
Yes, that patch makes it not to crash anymore.
If there aren't any side-effects of it..commit? :)

 [2003-05-29 04:03 UTC]
This bug has been fixed in CVS.

In case this was a PHP problem, snapshots of the sources are packaged
every three hours; this change will be in the next snapshot. You can
grab the snapshot at
In case this was a documentation problem, the fix will show up soon at

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