From: [EMAIL PROTECTED]
Operating system: Linux 2.2.16 (redhat 7.0)
PHP version: 4.1.2
PHP Bug Type: Reproducible crash
Bug description: reference to $_SESSION causes seg-fault
Configuration:
./configure --with-apxs --enable-debug
php.ini = php.ini-recommended
Apache 1.3.12
I have been using a procedure to create nicely-formatted tables of arrays
and their contents for a long time. It works very well under 4.1.2 (and
previous 4.* verions) for displaying $GLOBALS if session_start has not
been called. If session_start has been called, it causes a seg-fault when
the $HTTP_SESSION_VARS and/or $_SESSION is processed.
My normal script is much more elaborate, but I've stripped it to the bare
minimum to make the bugs more obvious. There are four 'fix' comments in
the code - implementing any one will make the problem go away, but none
should be necessary.
I have compiled 4.2.0rc1 with the same ./configure options and used the
4.2.0rc1-supplied php.ini-recommended file as part of a further test. The
output is the same, but the seg-fault is not reported to the error log
with 4.2.0rc1.
------------ index.php -------------------
<?PHP
# fix 1 is to pass the array by value
function CVTT (&$array, $depth=0) {
if($depth==0) {
print "<PRE>\n";
}
while(list($key,$value)=each($array)) {
# fix 2 is to skip both instances of the session variables array
### If this session-skipping block is enabled, there are no problems
# if($key=="_SESSION" || $key=="HTTP_SESSION_VARS") {
# print "skipping $key\n";
# continue;
# }
### End of session-skipping block
for($c=0;$c<$depth*5;$c++) {
print " ";
}
print "$key=";
if(is_array($value)) {
$valuestring="Array";
} elseif(is_object($value)) {
$valuestring="Object";
} elseif(is_bool($value)) {
if($value) {
$valuestring="Boolean True";
} else {
$valuestring="Boolean False";
}
} else {
$valuestring=$value;
}
print "$valuestring\n";
if(is_array($array[$key])) {
# fix 3 is to pass $value instead of $array[$key]
CVTT($array[$key], $depth+1);
}
}
if($depth==0) {
print "</PRE>\n";
}
}
# fix 4 is to eliminate the session_start
session_start();
$_SESSION['one']="two";
?>
<HTML>
<HEAD>
</HEAD>
<BODY>
<?PHP
CVTT($GLOBALS)
?>
</BODY>
</HTML>
---------------end of index.php -------------
I was not able to get a backtrace by following the instructions in the php
documentation. I'd be happy to try again with more-detailed
instructions.
If there is any further testing you would like, please let me know.
Sincerely,
Bryan
--
Edit bug report at http://bugs.php.net/?id=16278&edit=1
--
Fixed in CVS: http://bugs.php.net/fix.php?id=16278&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=16278&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=16278&r=needtrace
Try newer version: http://bugs.php.net/fix.php?id=16278&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=16278&r=support
Expected behavior: http://bugs.php.net/fix.php?id=16278&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=16278&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=16278&r=submittedtwice
