From d6c7850afad1e3ac7ac6a48c91251f220d6312a1 Mon Sep 17 00:00:00 2001
From: Sara Golemon <pollita@php.net>
Date: Mon, 2 Oct 2017 18:46:17 -0400
Subject: [PATCH] Explicitly release held references to PHP callbacks

---
 lua.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/lua.c b/lua.c
index d5f4acd..e44a990 100755
--- a/lua.c
+++ b/lua.c
@@ -63,6 +63,19 @@ ZEND_BEGIN_ARG_INFO_EX(arginfo_lua_free, 0, 0, 1)
 ZEND_END_ARG_INFO()
 /* }}} */
 
+static PHP_RSHUTDOWN_FUNCTION(lua) /* {{{ */
+{
+	zval *callbacks = zend_read_static_property(lua_ce, ZEND_STRL("_callbacks"), 1);
+
+	if (callbacks) {
+		zval_ptr_dtor(callbacks);
+	}
+
+	return SUCCESS;
+}
+/* }}} */
+
+
 /* {{{ lua_module_entry
 */
 zend_module_entry lua_module_entry = {
@@ -74,7 +87,7 @@ zend_module_entry lua_module_entry = {
 	PHP_MINIT(lua),
 	PHP_MSHUTDOWN(lua),
 	NULL,
-	NULL,
+	PHP_RSHUTDOWN(lua),
 	PHP_MINFO(lua),
 #if ZEND_MODULE_API_NO >= 20010901
 	PHP_LUA_VERSION,