indirectly fixed by latest LCL

src/ce_messages.pas

@@ -871,8 +871,6 @@ var
   pos: TPoint;
   msg: string;
 begin
-  //TODO-cbugfix: AV the the 3rd time a same message is clicked (when option singleClick is set),
-  // click to open matching file, back to editor, click (nothing, item is null), then click again: AV
   if List.Selected.isNil then
     exit;
   msg := List.Selected.Text;