3  95576 zend_dtrace_zval_addref:zval-addref zval: 88f5e84, refcount: 3, is_ref: 0

              php`zend_dtrace_zval_addref+0x1a
              php`_get_zval_cv_lookup_BP_VAR_W+0x103
              php`ZEND_ASSIGN_SPEC_CV_CONST_HANDLER+0x5b
              php`execute+0x425
              php`dtrace_execute+0xe7
              php`zend_execute_scripts+0xf7
              php`php_execute_script+0x33e
              php`do_cli+0x8b1
              php`main+0x53a
              php`_start+0x83

  3  95576 zend_dtrace_zval_addref:zval-addref zval: 88f5e84, refcount: 3, is_ref: 0

              php`zend_dtrace_zval_addref+0x1a
              php`_get_zval_cv_lookup_BP_VAR_W+0x103
              php`ZEND_ASSIGN_REF_SPEC_CV_CV_HANDLER+0xa6
              php`execute+0x425
              php`dtrace_execute+0xe7
              php`zend_execute_scripts+0xf7
              php`php_execute_script+0x33e
              php`do_cli+0x8b1
              php`main+0x53a
              php`_start+0x83

  3  95576 zend_dtrace_zval_addref:zval-addref zval: 8919790, refcount: 2, is_ref: 1

              php`zend_dtrace_zval_addref+0x1a
              php`zend_assign_to_variable_reference+0x1b5
              php`ZEND_ASSIGN_REF_SPEC_CV_CV_HANDLER+0xcb
              php`execute+0x425
              php`dtrace_execute+0xe7
              php`zend_execute_scripts+0xf7
              php`php_execute_script+0x33e
              php`do_cli+0x8b1
              php`main+0x53a
              php`_start+0x83

  3  95576 zend_dtrace_zval_addref:zval-addref zval: 8919790, refcount: 3, is_ref: 1

              php`zend_dtrace_zval_addref+0x1a
              php`ZEND_SEND_REF_SPEC_CV_HANDLER+0x22f
              php`ZEND_SEND_VAR_SPEC_CV_HANDLER+0x9d
              php`execute+0x425
              php`dtrace_execute+0xe7
              php`zend_execute_scripts+0xf7
              php`php_execute_script+0x33e
              php`do_cli+0x8b1
              php`main+0x53a
              php`_start+0x83

  3  95576 zend_dtrace_zval_addref:zval-addref zval: 88f5e84, refcount: 3, is_ref: 0

              php`zend_dtrace_zval_addref+0x1a
              php`_get_zval_cv_lookup_BP_VAR_W+0x58
              php`ZEND_RECV_SPEC_HANDLER+0x1fa
              php`execute+0x425
              php`dtrace_execute+0xe7
              php`zend_do_fcall_common_helper_SPEC+0xae6
              php`ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER+0x1d
              php`execute+0x425
              php`dtrace_execute+0xe7
              php`zend_execute_scripts+0xf7
              php`php_execute_script+0x33e
              php`do_cli+0x8b1
              php`main+0x53a
              php`_start+0x83

  3  95576 zend_dtrace_zval_addref:zval-addref zval: 8919790, refcount: 4, is_ref: 1

              php`zend_dtrace_zval_addref+0x1a
              php`ZEND_RECV_SPEC_HANDLER+0x25c
              php`execute+0x425
              php`dtrace_execute+0xe7
              php`zend_do_fcall_common_helper_SPEC+0xae6
              php`ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER+0x1d
              php`execute+0x425
              php`dtrace_execute+0xe7
              php`zend_execute_scripts+0xf7
              php`php_execute_script+0x33e
              php`do_cli+0x8b1
              php`main+0x53a
              php`_start+0x83