Don't copy from non-enabled current glyphs (bug#74274)

* src/dispnew.c (prepare_desired_root_row): Check if current row is
enabled.

1 files changed, 6 insertions, 3 deletions

diff --git a/src/dispnew.c b/src/dispnew.c
index b8bc9f73afa..260e7ef2d1d 100644
--- a/src/dispnew.c
+++ b/src/dispnew.c
@@ -3520,9 +3520,12 @@ prepare_desired_root_row (struct frame *root, int y)
   if (!root_row->enabled_p)
     {
       struct glyph_row *from = MATRIX_ROW (root->current_matrix, y);
-      memcpy (root_row->glyphs[0], from->glyphs[0],
-              root->current_matrix->matrix_w * sizeof (struct glyph));
-      root_row->enabled_p = true;
+      if (from->enabled_p)
+        {
+          memcpy (root_row->glyphs[0], from->glyphs[0],
+                  root->current_matrix->matrix_w * sizeof (struct glyph));
+          root_row->enabled_p = true;
+        }
     }
   return root_row;
 }