Fix display of cursor in obscure use case on MS-Windows

* src/xdisp.c (redisplay_internal): Detect when the frame
becomes garbaged inside the call to update_frame, and redraw
the frame in that case.  (Bug#37579)

1 files changed, 7 insertions, 0 deletions

diff --git a/src/xdisp.c b/src/xdisp.c
index 9d1fdecaffb..f5dedc218e2 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -15587,6 +15587,13 @@ redisplay_internal (void)
                   STOP_POLLING;
 
                   pending |= update_frame (f, false, false);
+                  /* On some platforms (at least MS-Windows), the
+                     scroll_run_hook called from scrolling_window
+                     called from update_frame could set the frame's
+                     garbaged flag, in which case we need to
+                     redisplay the frame.  */
+                  if (FRAME_GARBAGED_P (f))
+                    goto retry_frame;
                   f->cursor_type_changed = false;
                   f->updated_p = true;
                   f->inhibit_clear_image_cache = false;