From 9cea87c5775948a35098f3602746c20ecf95dbcd Mon Sep 17 00:00:00 2001
From: Bram Moolenaar <Bram@vim.org>
Date: Fri, 21 Sep 2018 16:59:45 +0200
Subject: patch 8.1.0425: ml_get error and crash with appendbufline()

Problem:    ml_get error and crash with appendbufline(). (Masashi Iizuka)
Solution:   Set per-window buffer info. (Hirohito Higashi, closes #3455)
---
 src/testdir/test_bufline.vim | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

(limited to 'src/testdir/test_bufline.vim')

diff --git a/src/testdir/test_bufline.vim b/src/testdir/test_bufline.vim
index 1f83e8b776..524144d5b9 100644
--- a/src/testdir/test_bufline.vim
+++ b/src/testdir/test_bufline.vim
@@ -91,6 +91,33 @@ func Test_appendbufline()
   exe "bwipe! " . b
 endfunc
 
+func Test_appendbufline_no_E315()
+  let after = [
+    \ 'set stl=%f ls=2',
+    \ 'new',
+    \ 'let buf = bufnr("%")',
+    \ 'quit',
+    \ 'vsp',
+    \ 'exec "buffer" buf',
+    \ 'wincmd w',
+    \ 'call appendbufline(buf, 0, "abc")',
+    \ 'redraw',
+    \ 'while getbufline(buf, 1)[0] =~ "^\\s*$"',
+    \ '  sleep 10m',
+    \ 'endwhile',
+    \ 'au VimLeavePre * call writefile([v:errmsg], "Xerror")',
+    \ 'au VimLeavePre * call writefile(["done"], "Xdone")',
+    \ 'qall!',
+    \ ]
+  if !RunVim([], after, '--clean')
+    return
+  endif
+  call assert_notmatch("^E315:", readfile("Xerror")[0])
+  call assert_equal("done", readfile("Xdone")[0])
+  call delete("Xerror")
+  call delete("Xdone")
+endfunc
+
 func Test_deletebufline()
   new
   let b = bufnr('%')
-- 
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