Patch 9.0.1321 (after 9.0.1320)
Problem:    vimscript test fails where using {expr} syntax.
Solution:   Only return FCERR_FAILED in call_user_func() for Vim9 script.
Files:      src/userfunc.c


*** ../vim-9.0.1320/src/userfunc.c      2023-02-18 14:42:40.113005575 +0000
--- src/userfunc.c      2023-02-18 15:28:58.378788606 +0000
***************
*** 3060,3066 ****
        clear_tv(rettv);
        rettv->v_type = VAR_NUMBER;
        rettv->vval.v_number = -1;
!       retval = FCERR_FAILED;
      }
  
  #ifdef FEAT_PROFILE
--- 3060,3070 ----
        clear_tv(rettv);
        rettv->v_type = VAR_NUMBER;
        rettv->vval.v_number = -1;
! 
!       // In corner cases returning a "failed" value is not backwards
!       // compatible.  Only do this for Vim9 script.
!       if (in_vim9script())
!           retval = FCERR_FAILED;
      }
  
  #ifdef FEAT_PROFILE
*** ../vim-9.0.1320/src/version.c       2023-02-18 14:42:40.117005581 +0000
--- src/version.c       2023-02-18 15:30:28.234545486 +0000
***************
*** 697,698 ****
--- 697,700 ----
  {   /* Add new patch number below this line */
+ /**/
+     1321,
  /**/

-- 
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 /// Bram Moolenaar -- [email protected] -- http://www.Moolenaar.net   \\\
///                                                                      \\\
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