Description:
------------
compiled against commit: a658465ef2ff7e4

I'm not seeing this in normal site operations but in some of the Drupal functional tests there are a bunch of database operations going on and a couple of them are triggering this segmentation fault.

#0  0x00000000005a7654 in pdo_mysql_stmt_dtor (stmt=0x7fffecc48a80)
    at /usr/src/php-src/ext/pdo_mysql/mysql_statement.c:93
#1  0x00000000005a3bfa in php_pdo_free_statement (stmt=0x7fffecc48a80)
    at /usr/src/php-src/ext/pdo/pdo_stmt.c:2320
#2  0x000000000076def2 in zend_objects_store_del (object=0x7fffecc48bd0)
    at /usr/src/php-src/Zend/zend_objects_API.c:181
#3  0x00000000005fc8fc in spl_dual_it_free_storage (_object=0x7fffecc78e10)
    at /usr/src/php-src/ext/spl/spl_iterators.c:2318
#4  0x000000000076def2 in zend_objects_store_del (object=0x7fffecc78e10)
    at /usr/src/php-src/Zend/zend_objects_API.c:181
#5  0x000000000076904b in i_zval_ptr_dtor (zval_ptr=0x7fffecc02958)
    at /usr/src/php-src/Zend/zend_variables.h:57
#6  zend_object_std_dtor (object=0x7fffecc02800)
    at /usr/src/php-src/Zend/zend_objects.c:68
#7  0x000000000076db81 in zend_objects_store_free_object_storage (objects=0x7fffed354cf8, 
    objects@entry=0xd843f0 <executor_globals+816>)
    at /usr/src/php-src/Zend/zend_objects_API.c:102
#8  0x0000000000720803 in shutdown_executor ()
    at /usr/src/php-src/Zend/zend_execute_API.c:356
#9  0x000000000072fe9b in zend_deactivate () at /usr/src/php-src/Zend/zend.c:969
#10 0x00000000006cefd2 in php_request_shutdown (dummy=<optimized out>)
    at /usr/src/php-src/main/main.c:1814
#11 0x00000000007cbc04 in do_cli (argc=-315273992, argv=0x7fffed800000)
    at /usr/src/php-src/sapi/cli/php_cli.c:1139
#12 0x0000000000433e20 in main (argc=-315273992, argv=0x7fffed800000)
    at /usr/src/php-src/sapi/cli/php_cli.c:1338

I haven't yet been able to narrow this to a simple test case. 

Config:
./configure \
    --prefix=$HOME/tmp/usr \
    --with-config-file-path=$HOME/tmp/usr/etc \
    --with-config-file-scan-dir=$HOME/tmp/usr/etc/conf.d/ \
    --disable-all \
    --enable-inline-optimization \
    --enable-opcache \
    --enable-phar \
    --enable-fpm \
    --enable-session \
    --enable-filter \
    --enable-json \
    --enable-libxml \
    --enable-xml \
    --enable-simplexml \
    --enable-dom \
    --enable-ctype \
    --enable-tokenizer \
    --enable-mbstring \
    --enable-bcmath \
    --enable-pcntl \
    --enable-ftp \
    --enable-exif \
    --enable-calendar \
    --enable-sysvmsg \
    --enable-sysvsem \
    --enable-sysvshm \
    --with-curl \
    --enable-hash \
    --with-mcrypt \
    --with-iconv \
    --with-gd \
    --with-jpeg-dir=/usr \
    --with-png-dir=/usr \
    --enable-gd-native-ttf \
    --enable-gd-jis-conv \
    --with-openssl \
    --enable-pdo \
    --enable-mysqlnd \
    --with-pdo-mysql \
    --with-sqlite3=/usr \
    --with-pdo-sqlite=/usr \
    --with-gettext=/usr \
    --enable-zip \
    --with-zlib-dir=/usr \
    --with-zlib=/usr \
    --with-mysqli=$MYSQL_CONFIG \
    --with-mysql-sock=/var/run/mysqld/mysqld.sock

Linked against mariadb: 10.0.21+maria-1~vivid



Test script:
---------------
Don't have simple test. Currently using this shell command against the Drupal test suite.
 
gdb --args /home/.../tmp/usr/bin/php ./core/scripts/run-tests.sh --url 'http://localhost.local/d8' --sqlite './test.sqlite' --dburl 'mysql://user:pass@localhost.local:3306/drupal8' --php '/home/.../tmp/usr/bin/php' --test-id 1 --color --die-on-fail --execute-test 'Drupal\aggregator\Tests\Migrate\d6\MigrateAggregatorItemTest'