OS: SunOS  5.7 Generic_106541-04 sun4u sparc SUNW,Ultra-2 
compiler: gcc-2.95.2-sol7-sparc
apache: 1.3.12

Configure options:
       ./configure\
        --with-oracle\
        --without-mysql\
        --with-imap\
        --with-ldap\
        --with-db2 \
        --enable-sysvsem\
        --enable-sysvshm\
        --enable-track-vars\
        --with-gd \
        --with-jpeg-dir=/usr/local/lib \
        --with-apxs=/usr/local/apache/bin/apxs



Script:

<?php

$key=0x123754;
$x = $key + 1;

//++++++++++++ 
// crash crash crash
$semid = sem_get($x);
// end crash 
//++++++++++++

sem_acquire($semid);
 
if($x=shm_attach($key, 64000, 0600)) { print "OK"; } else { print "NO"; }
 
shm_put_var($x, $test, "this_is_a_test");
print shm_get_var($x, $test);
shm_remove($key);
 
?>


Other example:

horde-1.2.0-pre10 (www.horde.org)
imp-2.2.0-pre10 (www.horde.org)
phplib-7 (http://phplib.netuse.de/)

Session management was configured to use shared memory
apache crashes with following log entry:
... [notice] child pid 18681 exit signal Bus Error (10) 

The same occours with older versions of php and/or apache.