Patch 8.1.2420
Problem:    Crash when calling popup_close() in win_execute().
Solution:   Disallow popup_close() in popup window. (Yasuhiro Matsumoto,
            closes #5345)
Files:      src/popupwin.c, src/testdir/test_popupwin.vim


*** ../vim-8.1.2419/src/popupwin.c      2019-12-01 15:23:07.464344509 +0100
--- src/popupwin.c      2019-12-11 19:31:27.634385892 +0100
***************
*** 1753,1759 ****
        // Check that arguments look OK.
        if (argvars[0].v_type == VAR_NUMBER)
        {
!           buf = buflist_findnr( argvars[0].vval.v_number);
            if (buf == NULL)
            {
                semsg(_(e_nobufnr), argvars[0].vval.v_number);
--- 1753,1759 ----
        // Check that arguments look OK.
        if (argvars[0].v_type == VAR_NUMBER)
        {
!           buf = buflist_findnr(argvars[0].vval.v_number);
            if (buf == NULL)
            {
                semsg(_(e_nobufnr), argvars[0].vval.v_number);
***************
*** 2097,2102 ****
--- 2097,2106 ----
  {
      int id = wp->w_id;
  
+     // Just in case a check higher up is missing.
+     if (wp == curwin && ERROR_IF_POPUP_WINDOW)
+       return;
+ 
      if (wp->w_close_cb.cb_name != NULL)
        // Careful: This may make "wp" invalid.
        invoke_popup_callback(wp, arg);
***************
*** 2331,2338 ****
  f_popup_close(typval_T *argvars, typval_T *rettv UNUSED)
  {
      int               id = (int)tv_get_number(argvars);
!     win_T     *wp = find_popup_win(id);
  
      if (wp != NULL)
        popup_close_and_callback(wp, &argvars[1]);
  }
--- 2335,2346 ----
  f_popup_close(typval_T *argvars, typval_T *rettv UNUSED)
  {
      int               id = (int)tv_get_number(argvars);
!     win_T     *wp;
! 
!     if (ERROR_IF_POPUP_WINDOW)
!       return;
  
+     wp = find_popup_win(id);
      if (wp != NULL)
        popup_close_and_callback(wp, &argvars[1]);
  }
*** ../vim-8.1.2419/src/testdir/test_popupwin.vim       2019-12-10 
23:43:09.672855573 +0100
--- src/testdir/test_popupwin.vim       2019-12-11 19:22:41.064055279 +0100
***************
*** 891,896 ****
--- 891,900 ----
    let winid = popup_create('some text', {})
    call assert_fails('call win_execute(winid, winnr() .. "close")', 'E994')
    call popup_clear()
+ 
+   let winid = popup_create('some text', {})
+   call assert_fails('call win_execute(winid, printf("normal! :\<C-u>call 
popup_close(%d)\<CR>", winid))', 'E994')
+   call popup_clear()
  endfunc
  
  func Test_win_execute_not_allowed()
*** ../vim-8.1.2419/src/version.c       2019-12-11 18:59:45.776537142 +0100
--- src/version.c       2019-12-11 19:22:08.544172019 +0100
***************
*** 744,745 ****
--- 744,747 ----
  {   /* Add new patch number below this line */
+ /**/
+     2420,
  /**/

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