From: Dmitry Stogov <dmitry@zend.com>
Date: Tue, 18 Jul 2017 17:41:01 +0000 (+0300)
Subject: Disabled compile-time constant DOUBLE to STRING evaluation (its result depends on... 
X-Git-Tag: php-7.2.0beta2~111
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=c41d2535b1b4162de59f62bc52a74f7448ba0933;p=php

Disabled compile-time constant DOUBLE to STRING evaluation (its result depends on run-time 'precision' setting)
---

diff --git a/ext/opcache/Optimizer/zend_optimizer.c b/ext/opcache/Optimizer/zend_optimizer.c
index afd1c15597..4b56809fda 100644
--- a/ext/opcache/Optimizer/zend_optimizer.c
+++ b/ext/opcache/Optimizer/zend_optimizer.c
@@ -163,7 +163,9 @@ int zend_optimizer_eval_cast(zval *result, uint32_t type, zval *op1) /* {{{ */
 			ZVAL_DOUBLE(result, zval_get_double(op1));
 			return SUCCESS;
 		case IS_STRING:
-			if (Z_TYPE_P(op1) != IS_ARRAY) {
+			/* Conversion from double to string takes into account run-time
+			   'precision' setting and cannot be evaluated at compile-time */
+			if (Z_TYPE_P(op1) != IS_ARRAY && Z_TYPE_P(op1) != IS_DOUBLE) {
 				ZVAL_STR(result, zval_get_string(op1));
 				return SUCCESS;
 			}