Another attempt to fix the "Destination array was not long enough" errors in AddToGUIUpdateList:

The errors seem to be caused by adding messages to the debug console from another thread, which may happen if an OpenAL error occurs during sound streaming. Now the debug console queues the messages and creates the necessary UI elements in the main thread, which should(?) make it thread-safe. (TODO: figure out what's causing the OpenAL errors)

Barotrauma/BarotraumaShared/Source/DebugConsole.cs

@@ -659,51 +659,24 @@ namespace Barotrauma
 
         public static void NewMessage(string msg, Color color)
         {
-            if (String.IsNullOrEmpty((msg))) return;
+            if (string.IsNullOrEmpty((msg))) return;
 
-            Messages.Add(new ColoredText(msg, color));
 #if SERVER
+            Messages.Add(new ColoredText(msg, color));
+
             //TODO: REMOVE
             Console.ForegroundColor = XnaToConsoleColor.Convert(color);
             Console.WriteLine(msg);
             Console.ForegroundColor = ConsoleColor.White;
-#endif
 
             if (Messages.Count > MaxMessages)
             {
                 Messages.RemoveRange(0, Messages.Count - MaxMessages);
             }
-
-#if CLIENT
-            //listbox not created yet, don't attempt to add
-            if (listBox == null) return;
-
-            if (listBox.children.Count > MaxMessages)
+#elif CLIENT
+            lock (queuedMessages)
             {
-                listBox.children.RemoveRange(0, listBox.children.Count - MaxMessages);
-            }
-
-            try
-            {
-                var textBlock = new GUITextBlock(new Rectangle(0, 0, listBox.Rect.Width, 0), msg, "", Alignment.TopLeft, Alignment.Left, null, true, GUI.SmallFont);
-                textBlock.CanBeFocused = false;
-                textBlock.TextColor = color;
-
-                listBox.AddChild(textBlock);
-                listBox.BarScroll = 1.0f;
-            }
-            catch
-            {
-                return;
-            }
-            
-            selectedIndex = listBox.children.Count;
-
-            if (activeQuestionText != null)
-            {
-                //make sure the active question stays at the bottom of the list
-                listBox.children.Remove(activeQuestionText);
-                listBox.children.Add(activeQuestionText);
+                queuedMessages.Enqueue(new ColoredText(msg, color));
             }
 #endif
         }