(window_loop, Fforce_window_update): Force mode line

updates by setting prevent_redisplay_optimizations_p and
update_mode_lines.

1 files changed, 9 insertions, 0 deletions

diff --git a/src/window.c b/src/window.c
index af0f6c3c0b5..3294e5cbd05 100644
--- a/src/window.c
+++ b/src/window.c
@@ -2044,6 +2044,9 @@ window_loop (type, obj, mini, frames)
             if (EQ (w->buffer, obj))
               {
                 mark_window_display_accurate (window, 0);
+                w->update_mode_line = Qt;
+                XBUFFER (obj)->prevent_redisplay_optimizations_p = 1;
+                ++update_mode_lines;
                 best_window = window;
               }
             break;
@@ -3462,12 +3465,18 @@ displaying that buffer.  */)
   if (NILP (object))
     {
       windows_or_buffers_changed++;
+      update_mode_lines++;
       return Qt;
     }
 
   if (WINDOWP (object))
     {
+      struct window *w = XWINDOW (object);
       mark_window_display_accurate (object, 0);
+      w->update_mode_line = Qt;
+      if (BUFFERP (w->buffer))
+        XBUFFER (w->buffer)->prevent_redisplay_optimizations_p = 1;
+      ++update_mode_lines;
       return Qt;
     }