Crash on shutdown

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$ UZE_ZEND_ALLOC=0 gdb --args $(phpenv which php) ./unit-tests/phpunit --not-exit -c phpunit.xml.dist unit-tests/
GNU gdb (Ubuntu 7.11.90.20161005-0ubuntu1) 7.11.90.20161005-git
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Reading symbols from /home/vladimir/.phpenv/versions/7.0.9-debug-nts/bin/php...done.
(gdb) run
Starting program: /home/vladimir/.phpenv/versions/7.0.9-debug-nts/bin/php ./unit-tests/phpunit --not-exit -c phpunit.xml.dist unit-tests/
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
PHPUnit 4.8.35 by Sebastian Bergmann and contributors.

Runtime:        PHP 7.0.9
Configuration:  /home/vladimir/workspace/zephir/phpunit.xml.dist

...............................................................  63 / 346 ( 18%)
............................................................... 126 / 346 ( 36%)
............................................................... 189 / 346 ( 54%)
............................................................... 252 / 346 ( 72%)
............................................................... 315 / 346 ( 91%)
...............................

Time: 835 ms, Memory: 10.00MB

OK (346 tests, 1453 assertions)

Program received signal SIGSEGV, Segmentation fault.
0x0000555555c97a36 in zend_string_release (s=0x0) at /tmp/php-build/source/7.0.9/Zend/zend_string.h:269
269     /tmp/php-build/source/7.0.9/Zend/zend_string.h: Немає такого файла або каталогу.
(gdb) bt
#0  0x0000555555c97a36 in zend_string_release (s=0x0) at /tmp/php-build/source/7.0.9/Zend/zend_string.h:269
#1  0x0000555555c98c02 in destroy_op_array (op_array=0x7fffeae79468) at /tmp/php-build/source/7.0.9/Zend/zend_opcode.c:369
#2  0x0000555555c97f60 in zend_function_dtor (zv=0x7fffeaeaa040) at /tmp/php-build/source/7.0.9/Zend/zend_opcode.c:124
#3  0x0000555555cc1d78 in zend_hash_destroy (ht=0x7fffeae79270) at /tmp/php-build/source/7.0.9/Zend/zend_hash.c:1265
#4  0x0000555555c988ba in destroy_zend_class (zv=0x7fffffffb2a0) at /tmp/php-build/source/7.0.9/Zend/zend_opcode.c:289
#5  0x0000555555cc1427 in _zend_hash_del_el_ex (ht=0x5555566f2390, idx=875, p=0x55555691b1e0, prev=0x0) at /tmp/php-build/source/7.0.9/Zend/zend_hash.c:1026
#6  0x0000555555cc1507 in _zend_hash_del_el (ht=0x5555566f2390, idx=875, p=0x55555691b1e0) at /tmp/php-build/source/7.0.9/Zend/zend_hash.c:1050
#7  0x0000555555cc2e03 in zend_hash_reverse_apply (ht=0x5555566f2390, apply_func=0x555555c91afa <clean_non_persistent_class>) at /tmp/php-build/source/7.0.9/Zend/zend_hash.c:1628
#8  0x0000555555c9287e in shutdown_executor () at /tmp/php-build/source/7.0.9/Zend/zend_execute_API.c:367
#9  0x0000555555cab0f7 in zend_deactivate () at /tmp/php-build/source/7.0.9/Zend/zend.c:967
#10 0x0000555555c138cc in php_request_shutdown (dummy=0x0) at /tmp/php-build/source/7.0.9/main/main.c:1833
#11 0x0000555555d74ea9 in do_cli (argc=6, argv=0x5555566f1fb0) at /tmp/php-build/source/7.0.9/sapi/cli/php_cli.c:1141
#12 0x0000555555d75725 in main (argc=6, argv=0x5555566f1fb0) at /tmp/php-build/source/7.0.9/sapi/cli/php_cli.c:1344

PHP 7.0.9 NTS DEBUG

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(gdb) frame 4
(gdb) print (char*)((zend_class_entry*)zv->value.ptr)->name->val
$1 = 0x7fffeb24cd98 "PHPUnit_Framework_Constraint_IsType"

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Related to #1488

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--- a/kernels/ZendEngine3/memory.c
+++ b/kernels/ZendEngine3/memory.c
@@ -400,7 +400,7 @@ void zephir_create_symbol_table()
 	entry->symbol_table = ex->symbol_table;
 	entry->prev         = gptr->active_symbol_table;
 
-	symbol_table = (zend_array*)emalloc(sizeof(zend_array *));
+	symbol_table = (zend_array*)emalloc(sizeof(zend_array));
 	zend_hash_init(symbol_table, 0, NULL, ZVAL_PTR_DTOR, 0);
 	zend_hash_real_init(symbol_table, 0);