Please provide a small script which can be used to produce this error, and also, if you can, provide a backtrace.

http://bugs.php.net/bugs-generating-backtrace.php


R.

No feedback. Closing.

I get this all the time when I include a recursive function call. I've tried rewriting the function several ways and get intermitten Segmentation faults.

I"ve tried just opening the fh and going down recursive directories with this, got the seg faults often.This version
buffers the file names in an array, closes the directory handle then processes the array, to count certain types of files in the directory tree. Still segfaults often enough to make it unreliable. I turned on the autoflush in php.ini and it dies in this routine.

FreeBSD 4.5-RELEASE
Apache/1.3.26 (Unix) PHP/4.2.2 mod_ssl/2.8.9 OpenSSL/0.9.6g
RegisterGlobals = On  :)

function CountFiles($dir,$d) {
  global $home;
  global $prod_count;
  $farray = array(); $d++;
  if (is_dir("$home$dir")) {
    print "<!-- ISDIR dir=$dir level=$d -->\n";
    if ($dfh = @opendir("$home$dir")) {
	while (($fil = readdir($dfh)) !== false) {
		if (!preg_match("/^\.+$/", $fil)) {
			array_push($farray,"$fil");
		}
	}
	closedir($dfh);
	if (count($farray) > 0) {
	  while (list ($key, $file) = each ($farray)) {	
	    if (is_dir("$home$dir/$file")) {
		CountFiles("$dir/$file",$d);
		flush();
	    } else if (preg_match("/^thumb_\w+\.|\.wav$|\.aif$/", $file)) {				$prod_count++;
		print "<!-- POST dir=$dir/$file prod_count=$prod_count -->\n";
		flush();
	    }
	}
      }
    }
  }
  flush();
}

It's not entirely reproducible, but once I got a directory where it causes the segfault I can comment out this routine and it's okay, comment it back and reload and it segfaults.
So in that sense it's reproducible. Restarting the web server has no effect. Though if I reload enough times sometimes the script completes, there is definitely some sort of bug, maybe the filehandle or array declaration isn't local or leaks out, not sure.

I've noticed the same problem, and reproduced it in my own.  I have PHP 4.3.4 and Zend Optimizer 2.5.0 installed on RH7.3

If I have a function that has a do..while(); construction in it, inside a block container { }, PHP will segfault on exiting the block container UNLESS I have a statement in between the end of the while (); and the closing brace of the block.

This snippet segfaults:

function announce()
{
	global $totalRows_announce, $row_announce, $announce, $srs;

	$ann = "";

	if ($totalRows_announce > 0) {
		do {
			$author = mysql_result(mysql_query("SELECT nick FROM players WHERE id='".$row_announce['author']."'", $srs), 0, "nick") or die(mysql_error());
			$msg_body = stripslashes(implode("<br>",explode("\n",$row_announce['msg_body'])));
			$ann .= textBlock(textBlock($row_announce['subject'], "", "anntitle") . br() . 
				textBlock("Posted by:".$author." | On: ".$row_announce['posted_date'], "", "annhead") . br() .
				textBlock($msg_body, "", "annbody"), "", (($row_announce['urgent'] == 1) ? "redrow" : ((($ctr++) % 2) ? "lightrow" : "darkrow"))) . br();
		} while ($row_announce = mysql_fetch_assoc($announce));
	} else {
		$ann = textBlock("No Announcements", "", "loginerr");
	} 
	return $ann;
}

This one does not:

function announce()
{
	global $totalRows_announce, $row_announce, $announce, $srs;

	$ann = "";

	if ($totalRows_announce > 0) {
		do {
			$author = mysql_result(mysql_query("SELECT nick FROM players WHERE id='".$row_announce['author']."'", $srs), 0, "nick") or die(mysql_error());
			$msg_body = stripslashes(implode("<br>",explode("\n",$row_announce['msg_body'])));
			$ann .= textBlock(textBlock($row_announce['subject'], "", "anntitle") . br() . 
				textBlock("Posted by:".$author." | On: ".$row_announce['posted_date'], "", "annhead") . br() .
				textBlock($msg_body, "", "annbody"), "", (($row_announce['urgent'] == 1) ? "redrow" : ((($ctr++) % 2) ? "lightrow" : "darkrow"))) . br();
		} while ($row_announce = mysql_fetch_assoc($announce));
		echo "";
	} else {
		$ann = textBlock("No Announcements", "", "loginerr");
	} 
	return $ann;
}

Note that the only difference between the two is the echo ""; statement immediately following the while(); clause.

This does NOT happen in "global" execution.  A do..while() loop that lives outside any function's scope works just fine; I have several other do..while() constructs outside of functions that work with no problems.  The segfault seems to only happen when the do..while(); is inside a function AND inside a block container (in this case, belonging to an if statement).

Any ideas?