From: Eli Zaretskii <eliz@gnu.org>
Date: Wed, 18 Oct 2017 16:16:16 +0000 (+0300)
Subject: Fix line number display after 'widen'
X-Git-Tag: emacs-26.0.91~525
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=2551d28fe8;p=emacs.git

Fix line number display after 'widen'

* src/xdisp.c (maybe_produce_line_number): Don't use data cached
by line-number-mode on the first redisplay after the buffer is
widened.  (Bug#28879)
---

diff --git a/src/xdisp.c b/src/xdisp.c
index b14b7daf2b0..6d9acecb424 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -20889,9 +20889,11 @@ maybe_produce_line_number (struct it *it)
 	      && it->w->base_line_pos <= IT_CHARPOS (*it)
 	      /* line-number-mode always displays narrowed line
 		 numbers, so we cannot use its data if the user wants
-		 line numbers that disregard narrowing.  */
+		 line numbers that disregard narrowing, or if the
+		 buffer's narrowing has just changed.  */
 	      && !(display_line_numbers_widen
-		   && (BEG_BYTE != BEGV_BYTE || Z_BYTE != ZV_BYTE)))
+		   && (BEG_BYTE != BEGV_BYTE || Z_BYTE != ZV_BYTE))
+	      && !current_buffer->clip_changed)
 	    {
 	      start_from = CHAR_TO_BYTE (it->w->base_line_pos);
 	      last_line = it->w->base_line_number - 1;