vim-patch:9.1.1916: WinEnter autocommand confuses Vim when closing tabpage (#36567)

Problem:  WinEnter autocommand may confuse Vim when closing tabpage
          (hokorobi)
Solution: Verify that curwin did not change in close_others()

fixes: vim/vim#18722
closes: vim/vim#18733

61b73b89a3

Co-authored-by: Christian Brabandt <cb@256bit.org>

test/old/testdir/test_autocmd.vim

@@ -4603,4 +4603,27 @@ func Test_eventignore_subtract()
   %bw!
 endfunc
 
+func Test_win_tabclose_autocmd()
+
+  defer CleanUpTestAuGroup()
+  new
+  augroup testing
+    au WinClosed * wincmd p
+  augroup END
+
+  tabnew
+  new
+  new
+
+  call assert_equal(2, tabpagenr('$'))
+  try
+    tabclose
+  catch
+    " should not happen
+    call assert_report("closing tabpage failed")
+  endtry
+  call assert_equal(1, tabpagenr('$'))
+  bw!
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab