From 5024c64c833130a7c6179bf67ba7622ffe9d2405 Mon Sep 17 00:00:00 2001
From: Rico Tzschichholz <ricotz@ubuntu.com>
Date: Thu, 10 Oct 2019 20:42:00 +0200
Subject: [PATCH] glib-2.0: Guard against passing null source to
 GLib.Memory.copy()

Found by -fsanitize=undefined
---
 vapi/glib-2.0.vapi | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/vapi/glib-2.0.vapi b/vapi/glib-2.0.vapi
index d5229327d..7e8cfab81 100644
--- a/vapi/glib-2.0.vapi
+++ b/vapi/glib-2.0.vapi
@@ -1465,8 +1465,10 @@ public class string {
 		GLib.Memory.copy (dest, this, start);
 		dest += start;
 
-		GLib.Memory.copy (dest, str, str_size);
-		dest += str_size;
+		if (str != null) {
+			GLib.Memory.copy (dest, str, str_size);
+			dest += str_size;
+		}
 
 		GLib.Memory.copy (dest, (char*) this + end, string_length - end);
 
-- 
2.47.2