Avoid segfault in overlay_arrows_changed_p

* src/xdisp.c (overlay_arrows_changed_p): Fix recent change
to avoid a segfault.

diff --git a/src/xdisp.c b/src/xdisp.c
index cec649f590d00c95059bfd74d8bb77e50e0d07c4..a4c3c706552d7f64de03bc1e61832401bc69245d 100644 (file)
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -13362,8 +13362,10 @@ overlay_arrows_changed_p (bool set_redisplay)
          || ! (pstr = overlay_arrow_string_or_property (var),
                EQ (pstr, Fget (var, Qlast_arrow_string))))
        {
-         if (set_redisplay)
-           bset_redisplay (XMARKER (val)->buffer);
+         struct buffer *buf = XMARKER (val)->buffer;
+
+         if (set_redisplay && buf)
+           bset_redisplay (buf);
          else
            return true;
        }