From ad27c4c66344f2a61bee8fbf2db3bf721894e38f Mon Sep 17 00:00:00 2001
From: Lars Ingebrigtsen <larsi@gnus.org>
Date: Thu, 30 Sep 2021 09:04:11 +0200
Subject: [PATCH] Fix previous `newline' patch

* lisp/simple.el (newline): Signal an error earlier to avoid
peculiar behaviour after getting a backtrace (bug#50900).
---
 lisp/simple.el | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lisp/simple.el b/lisp/simple.el
index 11a6a4f1fd3..36954151633 100644
--- a/lisp/simple.el
+++ b/lisp/simple.el
@@ -589,7 +589,8 @@ text-property `hard'.
 A non-nil INTERACTIVE argument means to run the `post-self-insert-hook'."
   (interactive "*P\np")
   (barf-if-buffer-read-only)
-  (when (< arg 0)
+  (when (and arg
+             (< arg 0))
     (error "Repetition argument has to be non-negative"))
   ;; Call self-insert so that auto-fill, abbrev expansion etc. happen.
   ;; Set last-command-event to tell self-insert what to insert.
-- 
2.39.5