Description:
------------
Run test script 1-10 times to see that in spite of the fact 
shm_put_var returns true, shm_has_var() returns false.

Calling sem_get() fixes the bug

Test script:
---------------
$processes = 300;
$shmem     = shm_attach(ftok(__FILE__, 'f'), 100000);
// If uncomment next line shm_put_var works correctly
// $sem   = sem_get(ftok(__FILE__, 'a'));
for ($i = 1; $i <= $processes; $i++) {
    if (pcntl_fork() === 0) {
        usleep(100000);
        $pid    = getmypid();
        $put_ok = shm_put_var($shmem, $pid, $i);
        if ($put_ok && !shm_has_var($shmem, $pid)) {
            print "shm_put_var() bug\n";
        }
        exit(0);
    }
}
while (pcntl_wait($status) !== -1){}

shm_remove($shmem);
shm_detach($shmem);