From 083d5ac36c735c83966ce211ddc54520b52644bd Mon Sep 17 00:00:00 2001
From: Daniel Carl <danielcarl@gmx.de>
Date: Mon, 13 Jan 2014 00:05:38 +0100
Subject: [PATCH] Fixed segfault on converting none string ref to char.

---
 src/js.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/js.c b/src/js.c
index 458fdb5..cd8e6a0 100644
--- a/src/js.c
+++ b/src/js.c
@@ -130,8 +130,15 @@ char* js_object_call_function(JSContextRef ctx, JSObjectRef obj,
 char* js_ref_to_string(JSContextRef ctx, JSValueRef ref)
 {
     char *string;
-    JSStringRef str_ref = JSValueToStringCopy(ctx, ref, NULL);
-    size_t len          = JSStringGetMaximumUTF8CStringSize(str_ref);
+    size_t len;
+    JSStringRef str_ref;
+
+    if (!ref) {
+        return NULL;
+    }
+
+    str_ref = JSValueToStringCopy(ctx, ref, NULL);
+    len     = JSStringGetMaximumUTF8CStringSize(str_ref);
 
     string = g_new0(char, len);
     JSStringGetUTF8CString(str_ref, string, len);
-- 
2.20.1