Description:
------------
Declare custom extension:

PHP_MINIT_FUNCTION(foobar) {
		zend_class_entry ce;

		INIT_CLASS_ENTRY(ce, "FooBar", foobar_methods);
		foo_bar_ce = zend_register_internal_class(&ce TSRMLS_CC);
		zend_declare_property_long(foo_bar_ce, ZEND_STRL("test"), 1, ZEND_ACC_PUBLIC | ZEND_ACC_STATIC TSRMLS_CC);

		return SUCCESS;
}

Test script:
---------------
<?php

class Test extends FooBar {

}

Actual result:
--------------
Segmentation fault

(gdb) bt
#0  0x000055890ea15213 in zval_get_type (pz=0x0) at /data/website/php-7.3.1/Zend/zend_types.h:411
#1  0x000055890ea18f54 in zend_do_inheritance (ce=0x7f486b40e018, parent_ce=0x5589112786b0) at /data/website/php-7.3.1/Zend/zend_inheritance.c:904
#2  0x000055890e993961 in do_bind_inherited_class (op_array=0x7f486b479300, opline=0x7f486b485000, class_table=0x5589111552a0, parent_ce=0x5589112786b0, compile_time=1 '\001')
    at /data/website/php-7.3.1/Zend/zend_compile.c:1151
#3  0x000055890e993be3 in zend_do_early_binding () at /data/website/php-7.3.1/Zend/zend_compile.c:1202
#4  0x000055890e9a7403 in zend_compile_top_stmt (ast=0x7f486b47b230) at /data/website/php-7.3.1/Zend/zend_compile.c:8154
#5  0x000055890e9a7394 in zend_compile_top_stmt (ast=0x7f486b47b018) at /data/website/php-7.3.1/Zend/zend_compile.c:8142
#6  0x000055890e96c587 in zend_compile (type=2) at Zend/zend_language_scanner.l:602
#7  0x000055890e96c6da in compile_file (file_handle=0x7fffb1caf210, type=8) at Zend/zend_language_scanner.l:636
#8  0x000055890e7b6dc9 in phar_compile_file (file_handle=0x7fffb1caf210, type=8) at /data/website/php-7.3.1/ext/phar/phar.c:3344
#9  0x000055890e9c4bb1 in zend_execute_scripts (type=8, retval=0x0, file_count=3) at /data/website/php-7.3.1/Zend/zend.c:1562
#10 0x000055890e933f3f in php_execute_script (primary_file=0x7fffb1caf210) at /data/website/php-7.3.1/main/main.c:2630
#11 0x000055890ea97fd7 in do_cli (argc=2, argv=0x558911154ec0) at /data/website/php-7.3.1/sapi/cli/php_cli.c:997
#12 0x000055890ea98f4a in main (argc=2, argv=0x558911154ec0) at /data/website/php-7.3.1/sapi/cli/php_cli.c:1389