From a45dc02a1421a002923a1e85214ab9d08ead9536 Mon Sep 17 00:00:00 2001
From: Jan Edmund Lazo <jan.lazo@mail.utoronto.ca>
Date: Fri, 28 Aug 2020 22:09:16 -0400
Subject: vim-patch:8.1.2198: crash when using :center in autocommand

Problem:    Crash when using :center in autocommand.
Solution:   Bail out early for an empty line. (Dominique pelle, closes vim/vim#5095)
https://github.com/vim/vim/commit/396b7c78c0fd9cd07528963b18c27398491df40d

Cherry-pick 'src/testdir/check.vim' changes from patch 8.1.1544.
---
 src/nvim/testdir/test_textformat.vim | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

(limited to 'src/nvim/testdir/test_textformat.vim')

diff --git a/src/nvim/testdir/test_textformat.vim b/src/nvim/testdir/test_textformat.vim
index 75673adf0a..2223be952c 100644
--- a/src/nvim/testdir/test_textformat.vim
+++ b/src/nvim/testdir/test_textformat.vim
@@ -1,4 +1,7 @@
 " Tests for the various 'formatoptions' settings
+
+source check.vim
+
 func Test_text_format()
   enew!
 
@@ -490,6 +493,23 @@ func Test_format_list_auto()
   set fo& ai& bs&
 endfunc
 
+func Test_crash_github_issue_5095()
+  CheckFeature autocmd
+
+  " This used to segfault, see https://github.com/vim/vim/issues/5095
+  augroup testing
+    au BufNew x center
+  augroup END
+
+  next! x
+
+  bw
+  augroup testing
+    au!
+  augroup END
+  augroup! testing
+endfunc
+
 " Test for formatting multi-byte text with 'fo=t'
 func Test_tw_2_fo_t()
   new
-- 
cgit