patch 8.2.0004: get E685 and E931 if buffer reload is interrupted

Problem:    Get E685 and E931 if buffer reload is interrupted.
Solution:   Do not abort deleting a dummy buffer. (closes #5361)
diff --git a/src/testdir/test_trycatch.vim b/src/testdir/test_trycatch.vim
index 7e51318..adc1745 100644
--- a/src/testdir/test_trycatch.vim
+++ b/src/testdir/test_trycatch.vim
@@ -1972,6 +1972,29 @@
   call assert_equal('jlmnpqrtueghivyzACD', g:Xpath)
 endfunc
 
-" Modelines								    {{{1
+func Test_reload_in_try_catch()
+  call writefile(['x'], 'Xreload')
+  set autoread
+  edit Xreload
+  tabnew
+  call writefile(['xx'], 'Xreload')
+  augroup ReLoad
+    au FileReadPost Xreload let x = doesnotexist
+    au BufReadPost Xreload let x = doesnotexist
+  augroup END
+  try
+    edit Xreload
+  catch
+  endtry
+  tabnew
+
+  tabclose
+  tabclose
+  autocmd! ReLoad
+  set noautoread
+  bwipe! Xreload
+  call delete('Xreload')
+endfunc
+
+" Modeline								    {{{1
 " vim: ts=8 sw=2 sts=2 expandtab tw=80 fdm=marker
-"-------------------------------------------------------------------------------