From aa8bebf9b3eff9e53eeb1dc1a91fcc9ee5ee1095 Mon Sep 17 00:00:00 2001
From: Eli Zaretskii
Date: Sat, 9 Nov 2024 14:07:09 +0200
Subject: ; * src/dispnew.c (prepare_desired_root_row): Add commentary
 (bug#74274).

---
 src/dispnew.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'src')

diff --git a/src/dispnew.c b/src/dispnew.c
index 260e7ef2d1d..1b8b726b7f3 100644
--- a/src/dispnew.c
+++ b/src/dispnew.c
@@ -3517,6 +3517,8 @@ prepare_desired_root_row (struct frame *root, int y)
   /* Start with the root's desired matrix row.  If that hasn't been
      redisplayed, copy from the root's current matrix.  */
   struct glyph_row *root_row = MATRIX_ROW (root->desired_matrix, y);
+  /* Don't copy rows that aren't enabled, in particuler because they
+     might not have the 'frame' member of glyphs set.  */
   if (!root_row->enabled_p)
     {
       struct glyph_row *from = MATRIX_ROW (root->current_matrix, y);
-- 
cgit v1.2.1