unmap里标记好已经要删除

main.c

@@ -4835,6 +4835,8 @@ void unmapnotify(struct wl_listener *listener, void *data) {
   /* Called when the surface is unmapped, and should no longer be shown. */
   Client *c = wl_container_of(listener, c, unmap);
 
+  c->iskilling = 1;
+
   if (c == grabc) {
     cursor_mode = CurNormal;
     grabc = NULL;