Fix 'display-line-numbers-mode' in hide-show buffers

* src/xdisp.c (redisplay_internal): Disable redisplay
optimizations that consider just the current line, when
'display-line-numbers-mode' is turned on in the buffer.
(Bug#54091)

1 files changed, 8 insertions, 0 deletions

diff --git a/src/xdisp.c b/src/xdisp.c
index aa70b933f14..3f283d6732a 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -15860,6 +15860,14 @@ redisplay_internal (void)
       /* Point must be on the line that we have info recorded about.  */
       && PT >= CHARPOS (tlbufpos)
       && PT <= Z - CHARPOS (tlendpos)
+      /* FIXME: The following condition is only needed when
+         significant parts of the buffer are hidden (e.g., under
+         hs-minor-mode), but there doesn't seem to be a simple way of
+         detecting that, so we always disable the one-line redisplay
+         optimizations whenever display-line-numbers-mode is turned on
+         in the buffer.  */
+      && (NILP (Vdisplay_line_numbers)
+          || EQ (Vdisplay_line_numbers, Qvisual))
       /* All text outside that line, including its final newline,
          must be unchanged.  */
       && text_outside_line_unchanged_p (w, CHARPOS (tlbufpos),