From e806cb732a2a3f1e409528988a0571421c541078 Mon Sep 17 00:00:00 2001
From: Dmitry Stogov <dmitry@zend.com>
Date: Mon, 29 Oct 2018 22:32:15 +0300
Subject: [PATCH] Fixed double-free

---
 ext/opcache/ZendAccelerator.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/ext/opcache/ZendAccelerator.c b/ext/opcache/ZendAccelerator.c
index a7f97c09a67..e4fe18c8f0a 100644
--- a/ext/opcache/ZendAccelerator.c
+++ b/ext/opcache/ZendAccelerator.c
@@ -3712,6 +3712,10 @@ static int accel_preload(const char *config)
 		zend_string *filename;
 		int i;
 
+		/* Release stored values to avoid dangling pointers */
+		zend_hash_graceful_reverse_destroy(&EG(symbol_table));
+		zend_hash_init(&EG(symbol_table), 0, NULL, ZVAL_PTR_DTOR, 0);
+
 		preload_link();
 		preload_remove_empty_includes();