From c853c3fcc7ba2efbf78ef80b46dddda57d132510 Mon Sep 17 00:00:00 2001
From: Thibault "bui" Koechlin
Date: Fri, 26 Jan 2018 18:35:40 +0100
Subject: Fix a segfault in `get_local_var` (#138)

This commit fixes a segfault where 'get_local_var' would fail if no functions where called yet (`symtable` will be NULL)---
 src/sp_var_value.c | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'src/sp_var_value.c')

diff --git a/src/sp_var_value.c b/src/sp_var_value.c
index a3eed3e..05598bf 100644
--- a/src/sp_var_value.c
+++ b/src/sp_var_value.c
@@ -27,6 +27,11 @@ static zval *get_local_var(zend_execute_data *ed, const char *var_name) {
     EG(current_execute_data) = current;
     zend_array *symtable = zend_rebuild_symbol_table();
 
+    if (UNEXPECTED(symtable == NULL)) {
+      EG(current_execute_data) = orig_execute_data;
+      return NULL;
+    }
+
     ZEND_HASH_FOREACH_STR_KEY_VAL(symtable, key, value) {
       if (0 == strcmp(var_name, key->val)) {
         if (Z_TYPE_P(value) == IS_INDIRECT) {
-- 
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