# HG changeset patch
# User Bram Moolenaar <Bram@vim.org>
# Date 1625398204 -7200
# Node ID 2d3660601fdbdb3c1e7db7aba010b1abbcf55b1e
# Parent  e7b08a596ea06bc54a644ae349f1a767ba692902
patch 8.2.3097: crash when using "quit" at recovery prompt

Commit: https://github.com/vim/vim/commit/1d97efce0ce31ddf0dd4c1ae2228ef4caee6880c
Author: Bram Moolenaar <Bram@vim.org>
Date:   Sun Jul 4 13:27:11 2021 +0200

    patch 8.2.3097: crash when using "quit" at recovery prompt

    Problem:    Crash when using "quit" at recovery prompt and autocommands are
                triggered.
    Solution:   Block autocommands when creating an empty buffer to use as the
                current buffer. (closes #8506)

diff --git a/src/buffer.c b/src/buffer.c
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -1130,7 +1130,12 @@ handle_swap_exists(bufref_T *old_curbuf)
 	close_buffer(curwin, curbuf, DOBUF_UNLOAD, FALSE, FALSE);
 	if (old_curbuf == NULL || !bufref_valid(old_curbuf)
 					      || old_curbuf->br_buf == curbuf)
+	{
+	    // Block autocommands here because curwin->w_buffer is NULL.
+	    block_autocmds();
 	    buf = buflist_new(NULL, NULL, 1L, BLN_CURBUF | BLN_LISTED);
+	    unblock_autocmds();
+	}
 	else
 	    buf = old_curbuf->br_buf;
 	if (buf != NULL)
diff --git a/src/testdir/test_swap.vim b/src/testdir/test_swap.vim
--- a/src/testdir/test_swap.vim
+++ b/src/testdir/test_swap.vim
@@ -360,6 +360,7 @@ func Test_swap_prompt_splitwin()
   let buf = RunVimInTerminal('', {'rows': 20})
   call term_sendkeys(buf, ":set nomore\n")
   call term_sendkeys(buf, ":set noruler\n")
+
   call term_sendkeys(buf, ":split Xfile1\n")
   call TermWait(buf)
   call WaitForAssert({-> assert_match('^\[O\]pen Read-Only, (E)dit anyway, (R)ecover, (Q)uit, (A)bort: $', term_getline(buf, 20))})
@@ -371,8 +372,19 @@ func Test_swap_prompt_splitwin()
   call TermWait(buf)
   call WaitForAssert({-> assert_match('^1$', term_getline(buf, 20))})
   call StopVimInTerminal(buf)
+
+  " This caused Vim to crash when typing "q".
+  " TODO: it does not actually reproduce the crash.
+  call writefile(['au BufAdd * set virtualedit=all'], 'Xvimrc')
+
+  let buf = RunVimInTerminal('-u Xvimrc Xfile1', {'rows': 20, 'wait_for_ruler': 0})
+  call TermWait(buf)
+  call WaitForAssert({-> assert_match('^\[O\]pen Read-Only, (E)dit anyway, (R)ecover, (Q)uit, (A)bort:', term_getline(buf, 20))})
+  call term_sendkeys(buf, "q")
+
   %bwipe!
   call delete('Xfile1')
+  call delete('Xvimrc')
 endfunc
 
 func Test_swap_symlink()
diff --git a/src/version.c b/src/version.c
--- a/src/version.c
+++ b/src/version.c
@@ -756,6 +756,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3097,
+/**/
     3096,
 /**/
     3095,