Prevent infloop in redisplay on TTY frames

* src/xdisp.c (extend_face_to_end_of_line): Avoid infloop when
filling up display margins with the default face's background.
(Bug#29789)

1 files changed, 2 insertions, 0 deletions

diff --git a/src/xdisp.c b/src/xdisp.c
index 7601e26a902..c3a46651da8 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -20280,6 +20280,7 @@ extend_face_to_end_of_line (struct it *it)
               /* term.c:produce_glyphs advances it->current_x only for
                  TEXT_AREA.  */
               it->current_x += it->pixel_width;
+              ++it->glyph_row->used[LEFT_MARGIN_AREA];
             }
 
           it->current_x = saved_x;
@@ -20317,6 +20318,7 @@ extend_face_to_end_of_line (struct it *it)
             {
               PRODUCE_GLYPHS (it);
               it->current_x += it->pixel_width;
+              ++it->glyph_row->used[RIGHT_MARGIN_AREA];
             }
 
           it->area = TEXT_AREA;