* alloc.c (mark_object): Revert window marking code

since it's unsafe for the Fset_window_configuration.

1 files changed, 11 insertions, 15 deletions

diff --git a/src/alloc.c b/src/alloc.c
index e90cca637df..aca0a82d1b5 100644
--- a/src/alloc.c
+++ b/src/alloc.c
@@ -6019,22 +6019,18 @@ mark_object (Lisp_Object arg)
           case PVEC_WINDOW:
             {
               struct window *w = (struct window *) ptr;
-              bool leaf = NILP (w->hchild) && NILP (w->vchild);
-
-              if (leaf && NILP (w->buffer))
-                /* If the window is deleted, mark just the window itself.  */
-                VECTOR_MARK (ptr);
-              else
+              
+              /* Even if the window is deleted, we can't mark just the window
+                 itself because set-window-configuration can resurrect it.  */
+              mark_vectorlike (ptr);
+              /* Mark glyphs for leaf windows.  Marking window
+                 matrices is sufficient because frame matrices
+                 use the same glyph memory.  */
+              if (NILP (w->hchild) && NILP (w->vchild)
+                  && w->current_matrix)
                 {
-                  mark_vectorlike (ptr);
-                  /* Mark glyphs for leaf windows.  Marking window
-                     matrices is sufficient because frame matrices
-                     use the same glyph memory.  */
-                  if (leaf && w->current_matrix)
-                    {
-                      mark_glyph_matrix (w->current_matrix);
-                      mark_glyph_matrix (w->desired_matrix);
-                    }
+                  mark_glyph_matrix (w->current_matrix);
+                  mark_glyph_matrix (w->desired_matrix);
                 }
             }
             break;