Fix possible crashes if remote hosts are deleted during processing

renderdocui/Controls/TreeListView/TreeListNode.cs

@@ -222,6 +222,8 @@ namespace TreelistView
 			}
 			set
 			{
+				if (Owner == null)
+					return;
 				this[Owner.FieldIndex(fieldname)] = value;
 			}
 		}

renderdocui/Windows/MainWindow.cs

@@ -294,7 +294,7 @@ namespace renderdocui.Windows
             // perform a probe of known remote hosts to see if they're running or not
             if (!me.m_Core.LogLoading && !me.m_Core.LogLoaded)
             {
-                foreach (var host in me.m_Core.Config.RemoteHosts)
+                foreach (var host in me.m_Core.Config.RemoteHosts.ToArray())
                 {
                     // don't mess with a host we're connected to - this is handled anyway
                     if (host.Connected)