source_node      2590 Zend/zend_compile.c 	znode target_node, source_node;
source_node      2601 Zend/zend_compile.c 	zend_delayed_compile_var(&source_node, source_ast, BP_VAR_REF);
source_node      2604 Zend/zend_compile.c 	if (source_node.op_type != IS_VAR && zend_is_call(source_ast)) {
source_node      2608 Zend/zend_compile.c 	opline = zend_emit_op(result, ZEND_ASSIGN_REF, &target_node, &source_node);