Please try using this CVS snapshot:

  http://snaps.php.net/php5-latest.tar.gz
 
For Windows:
 
  http://snaps.php.net/win32/php5-win32-latest.zip

The bug is still reproducible, on the same code base. I don't have a windows compiler for C, so I can't try the hugely useful suggestion from polita. 

I've commented out or replaced all instances of bcmath functions in my code. I don't have a windows compiler for C, so I can't try the hugely useful suggestion from polita. 

If someone can point me to some binaries I'll test them.

Latest snapshot

For Windows:
 
  http://snaps.php.net/win32/php5-win32-latest.zip

The same code causes the same problem with PHP5 RC2. Output from the first section of phpinfo() below.
-----------------------------
PHP Version 5.0.0RC2-dev
System 	Windows NT ME 5.1 build 2600
Build Date 	Apr 3 2004 04:32:40
Configure Command 	cscript /nologo configure.js "--enable-snapshot-build" "--with-gd=shared"
Server API 	Apache 2.0 Handler
Virtual Directory Support 	enabled
Configuration File (php.ini) Path 	C:\WINDOWS\php.ini
PHP API 	20031224
PHP Extension 	20040316
Zend Extension 	90021012
Debug Build 	no
Thread Safety 	enabled
IPv6 Support 	enabled
Registered PHP Streams 	php, file, http, ftp, compress.zlib
Registered Stream Socket Transports 	tcp, udp
.............
BCMath support 	enabled

works fine for me using latest CVS snapshot.

Latest snapshot crashes on both Apaches 2.0.48 and 1.3.29 on WinXP.

This bug still exists in PHP5RC2. There isn't a problem with bcmath itself, but something is corrupting heap memory that bcmath uses.
bcmath allocates three numbers (zero, one, and two) when it first starts up. If any of these numbers is then used (such as when adding zero to a number in bcadd) Apache crashes.

bug is closed so i dare to add 'me too' so maybe someone will reopen it :]
php5 rc2: problem exists in both bc_sub and bc_add (PEAR`s Benchmark_Timer works great as perfect example of this bug)

update the function getProfiling() in timer.php as the follows, maybe you can fix the bug. 

    function getProfiling() {
        $i = 0;
        $total = $temp = '0.0';
        $result = array();

        foreach ($this->markers as $marker => $time) {

            if (extension_loaded('bcmath')) {
                $diff  = bcsub($time, $temp, 6);

                if ($i > 0)
                	$total = bcadd($total, $diff, 6);
            } else {
                $diff  = $time - $temp;
                $total = $total + $diff;
            }
            
            echo "$time   $diff $total <br>";

            $result[$i]['name']  = $marker;
            $result[$i]['time']  = $time;
            $result[$i]['diff']  = $diff;
            $result[$i]['total'] = $total;

            $this->strlen_max = (strlen($marker) > $this->strlen_max ? strlen($marker) + 1 : $this->strlen_max);

            $temp = $time;
            $i++;

        }


        $result[0]['diff'] = '-';
        $this->strlen_max = (strlen('total') > $this->strlen_max ? strlen('total') : $this->strlen_max);
        $this->strlen_max += 4;

        return $result;
    }

The reproduce code still crashes on my box Windows 2000 pro, Apache 1.3.27, PHP5 build 2195. And not only with "bcadd" but also with :
$total = "0";
$diff = "";
bcpow($total, $diff, 6);

And :
$total = "0";
$diff = "";
bcsub($total, $diff, 6);

However I've to admit that ttt_cao at hotmail dot com's remedy does work. By the way, I'm not using PEAR`s
Benchmark_Timer.

Hope someone will look at this. Thanks in advance.

Perrick :: http://www.onpk.net/

This bug still exists in the final release (5.0.0).  I'm running Apache 2, PHP 5.0.0, and Windows XP Pro.  Same test case:

$total = "0";
$diff = "";
$result = bcadd($total, $diff, 6);
echo $result;
exit;

The following also causes Apache to crash:

$total = "0";
$diff = "";
$result = bcpow($total, $diff, 6);
echo $result;
exit;

The fix was located just *after* the release of 5.0.0 (literally, like, the next day), look for it in 5.0.1.