Consider op1 literal of FETCH_OBJ_R

FETCH_OBJ_R may have an op1 CONST operand, even though it will
always error. We should take this into account when compacting
literals.

Author: nikic

ext/opcache/Optimizer/compact_literals.c

@@ -223,6 +223,9 @@ void zend_optimizer_compact_literals(zend_op_array *op_array, zend_optimizer_ctx
 				case ZEND_POST_INC_OBJ:
 				case ZEND_POST_DEC_OBJ:
 				case ZEND_ISSET_ISEMPTY_PROP_OBJ:
+					if (opline->op1_type == IS_CONST) {
+						LITERAL_INFO(opline->op1.constant, LITERAL_VALUE, 1);
+					}
 					if (opline->op2_type == IS_CONST) {
 						LITERAL_INFO(opline->op2.constant, LITERAL_PROPERTY, 1);
 					}