Patch 8.2.2021
Problem:    Vim9: get E1099 when autocommand resets did_emsg.
Solution:   Add did_emsg_cumul. (closes #7336)
Files:      src/globals.h, src/ex_docmd.c, src/vim9execute.c,
            src/testdir/test_vim9_func.vim


*** ../vim-8.2.2020/src/globals.h       2020-11-04 11:03:08.372891857 +0100
--- src/globals.h       2020-11-20 19:11:49.968042865 +0100
***************
*** 230,235 ****
--- 230,237 ----
  EXTERN int    did_emsg;                   // set by emsg() when the message
                                            // is displayed or thrown
  #ifdef FEAT_EVAL
+ EXTERN int    did_emsg_cumul;             // cumulative did_emsg, increased
+                                           // when did_emsg is reset.
  EXTERN int    called_vim_beep;            // set if vim_beep() is called
  EXTERN int    did_uncaught_emsg;          // emsg() was called and did not
                                            // cause an exception
*** ../vim-8.2.2020/src/ex_docmd.c      2020-11-12 14:20:32.021927293 +0100
--- src/ex_docmd.c      2020-11-20 19:14:38.799505782 +0100
***************
*** 747,752 ****
--- 747,755 ----
       * cancel the whole command line, and any if/endif or loop.
       * If force_abort is set, we cancel everything.
       */
+ #ifdef FEAT_EVAL
+     did_emsg_cumul += did_emsg;
+ #endif
      did_emsg = FALSE;
  
      /*
***************
*** 778,784 ****
--- 781,792 ----
                && !(getline_is_func && func_has_abort(real_cookie))
  #endif
                                                        )
+       {
+ #ifdef FEAT_EVAL
+           did_emsg_cumul += did_emsg;
+ #endif
            did_emsg = FALSE;
+       }
  
        /*
         * 1. If repeating a line in a loop, get a line from lines_ga.
***************
*** 1026,1032 ****
--- 1034,1043 ----
        if (did_emsg && !force_abort
                && getline_equal(fgetline, cookie, get_func_line)
                                              && !func_has_abort(real_cookie))
+       {
+           // did_emsg_cumul is not set here
            did_emsg = FALSE;
+       }
  
        if (cstack.cs_looplevel > 0)
        {
*** ../vim-8.2.2020/src/vim9execute.c   2020-11-17 18:23:15.519278866 +0100
--- src/vim9execute.c   2020-11-20 19:24:41.249551834 +0100
***************
*** 833,839 ****
      int               defcount = ufunc->uf_args.ga_len - argc;
      sctx_T    save_current_sctx = current_sctx;
      int               breakcheck_count = 0;
!     int               did_emsg_before = did_emsg;
      int               save_suppress_errthrow = suppress_errthrow;
      msglist_T **saved_msg_list = NULL;
      msglist_T *private_msg_list = NULL;
--- 833,839 ----
      int               defcount = ufunc->uf_args.ga_len - argc;
      sctx_T    save_current_sctx = current_sctx;
      int               breakcheck_count = 0;
!     int               did_emsg_before = did_emsg_cumul + did_emsg;
      int               save_suppress_errthrow = suppress_errthrow;
      msglist_T **saved_msg_list = NULL;
      msglist_T *private_msg_list = NULL;
***************
*** 859,865 ****
            || (ufunc->uf_def_status == UF_TO_BE_COMPILED
                          && compile_def_function(ufunc, FALSE, NULL) == FAIL))
      {
!       if (did_emsg == did_emsg_before)
            semsg(_(e_function_is_not_compiled_str),
                                                   printable_func_name(ufunc));
        return FAIL;
--- 859,865 ----
            || (ufunc->uf_def_status == UF_TO_BE_COMPILED
                          && compile_def_function(ufunc, FALSE, NULL) == FAIL))
      {
!       if (did_emsg_cumul + did_emsg == did_emsg_before)
            semsg(_(e_function_is_not_compiled_str),
                                                   printable_func_name(ufunc));
        return FAIL;
***************
*** 1086,1098 ****
            // execute Ex command line
            case ISN_EXEC:
                {
-                   int save_did_emsg = did_emsg;
- 
                    SOURCING_LNUM = iptr->isn_lnum;
                    do_cmdline_cmd(iptr->isn_arg.string);
!                   // do_cmdline_cmd() will reset did_emsg, but we want to
!                   // keep track of the count to compare with did_emsg_before.
!                   did_emsg += save_did_emsg;
                }
                break;
  
--- 1086,1095 ----
            // execute Ex command line
            case ISN_EXEC:
                {
                    SOURCING_LNUM = iptr->isn_lnum;
                    do_cmdline_cmd(iptr->isn_arg.string);
!                   if (did_emsg)
!                       goto on_error;
                }
                break;
  
***************
*** 1211,1216 ****
--- 1208,1215 ----
                        {
                            SOURCING_LNUM = iptr->isn_lnum;
                            do_cmdline_cmd((char_u *)ga.ga_data);
+                           if (did_emsg)
+                               goto on_error;
                        }
                        else
                        {
***************
*** 2894,2900 ****
  
  on_error:
        // If "emsg_silent" is set then ignore the error.
!       if (did_emsg == did_emsg_before && emsg_silent)
            continue;
  
        // If we are not inside a try-catch started here, abort execution.
--- 2893,2899 ----
  
  on_error:
        // If "emsg_silent" is set then ignore the error.
!       if (did_emsg_cumul + did_emsg == did_emsg_before && emsg_silent)
            continue;
  
        // If we are not inside a try-catch started here, abort execution.
***************
*** 2952,2958 ****
      // Not sure if this is necessary.
      suppress_errthrow = save_suppress_errthrow;
  
!     if (ret != OK && did_emsg == did_emsg_before)
        semsg(_(e_unknown_error_while_executing_str),
                                                   printable_func_name(ufunc));
      funcdepth_restore(orig_funcdepth);
--- 2951,2957 ----
      // Not sure if this is necessary.
      suppress_errthrow = save_suppress_errthrow;
  
!     if (ret != OK && did_emsg_cumul + did_emsg == did_emsg_before)
        semsg(_(e_unknown_error_while_executing_str),
                                                   printable_func_name(ufunc));
      funcdepth_restore(orig_funcdepth);
*** ../vim-8.2.2020/src/testdir/test_vim9_func.vim      2020-11-19 
21:47:52.722076508 +0100
--- src/testdir/test_vim9_func.vim      2020-11-20 19:22:29.445966471 +0100
***************
*** 1704,1708 ****
--- 1704,1722 ----
    CheckScriptSuccess(lines)
  enddef
  
+ def Test_reset_did_emsg()
+   var lines =<< trim END
+       @s = 'blah'
+       au BufWinLeave * #
+       def Func()
+         var winid = popup_create('popup', {})
+         exe '*s'
+         popup_close(winid)
+       enddef
+       Func()
+   END
+   CheckScriptFailure(lines, 'E492:', 8)
+ enddef
+ 
  
  " vim: ts=8 sw=2 sts=2 expandtab tw=80 fdm=marker
*** ../vim-8.2.2020/src/version.c       2020-11-20 18:59:14.470192932 +0100
--- src/version.c       2020-11-20 19:26:23.581268712 +0100
***************
*** 752,753 ****
--- 752,755 ----
  {   /* Add new patch number below this line */
+ /**/
+     2021,
  /**/

-- 
Facepalm statement #1: "I'm going to New York tomorrow, hopefully I have time
to visit the White House"

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