PHP 4.0 Bug #4816: session_module_name('something') = segfault

From: troels@arvin.dk Operating system: Red Hat Linux 6.2 PHP version: 4.0.0 Release PHP Bug Type: Reproduceable crash Bug description: session_module_name('something') = segfault Example code: <?php session_start(); $name=session_module_name('files'); print "<p>Session module name: $name</p>"; print "<p>Counter value: $counter</p>"; $counter++; session_register('counter'); ?> Causes segmentation fault with the following Apache error log message: [notice] child pid 8249 exit signal Segmentation fault (11) If the following code is used in stead, the session_module_name() function simply doesn't work as I expected (the module name is not changed to mm): <?php $name=session_module_name('mm'); session_start(); print "<p>Session module name: $name</p>"; print "<p>Counter value: $counter</p>"; $counter++; session_register('counter'); ?> (After some reloads,) this outputs: =============================== Session module name: files Counter value: 2 =============================== Maybe session_module_name() should never be called after session_start() ? - but then again, it shouldn't result in one does it anyway. Setting the session module handler to "mm" in php.ini via the session.save_handler statement works fine. PHP is - of course - compiled with mm support, using mm v. 1.1.2. I haven't been able to produce a core file/backtrace yet, but I'll work on it. configure statement: ./configure \ --prefix=$RPM_BUILD_ROOT/usr \ --with-apxs \ --libdir=$RPM_BUILD_ROOT/usr/lib/php4 \ --includedir=$RPM_BUILD_ROOT/usr/include \ --datadir=$RPM_BUILD_ROOT/usr/share/php \ --with-config-file-path=/etc/httpd \ --enable-inline-optimization \ --enable-magic-quotes \ --enable-track-vars \ --enable-memory-limit \ --enable-wddx \ --enable-sysvsem=shared \ --enable-sysvshm=shared \ --disable-debug \ --with-xml \ --with-gd=shared \ --with-ttf \ --with-ftp \ --with-readline=shared \ --with-mm \ --with-mysql=shared \ --with-ldap=shared \ --with-imap=shared \ --with-zlib \ --with-pgsql=shared \ --with-gettext=shared php.ini: extension_dir = /usr/lib/php4 extension=/usr/lib/php4/readline.so extension=/usr/lib/php4/sysvsem.so extension=/usr/lib/php4/sysvshm.so ; TWIG currently needs this: allow_call_time_pass_reference = On track_errors = On warn_plus_overloading = On track_vars = On magic_quotes_gpc = On magic_quotes_runtime = Off enable_dl = On register_argc_argv = Off include_path = ".:/usr/share/php" variables_order = "GPCS" session.save_path = "/var/state/php" session.save_handler = files extension=/usr/lib/php4/gd.so extension=/usr/lib/php4/gettext.so extension=/usr/lib/php4/imap.so extension=/usr/lib/php4/ldap.so extension=/usr/lib/php4/mysql.so extension=/usr/lib/php4/pgsql.so PHP version: 4.0.0 with some patches from CVS. Apache is the Apache in Red Hat 6.2, i.e. compiled with EAPI. Hardware: My Pentium II laptop.