Update: add source info at microstep "quit" events

lib/lutin/lutExe.ml

@@ -2124,7 +2124,7 @@ let rec (genpath_ldbg : t -> store -> t CoTraceExp.t -> ctx ->
                      Event.outputs = ctx.Event.outputs;
                      Event.locals = []; (* fixme *)
                      Event.data = ctx.Event.data;
-                     Event.sinfo = None;
+                     Event.sinfo = ctx.Event.sinfo;
                      Event.next =
                        (fun () -> step_ldbg ctx t react ins cont3 fail_cont excn_cont);
                      Event.terminate = ctx.Event.terminate;