Patch 9.0.1218
Problem:    Completion includes functions that don't work.
Solution:   Skip functions that are not implemented. (Kota Kato,
            closes #11845)
Files:      src/evalfunc.c, src/testdir/test_cmdline.vim


*** ../vim-9.0.1217/src/evalfunc.c      2023-01-17 18:31:20.427373305 +0000
--- src/evalfunc.c      2023-01-18 15:26:20.440139724 +0000
***************
*** 2872,2877 ****
--- 2872,2881 ----
      }
      if (++intidx < (int)ARRAY_LENGTH(global_functions))
      {
+       // Skip if the function doesn't have an implementation (feature not
+       // implemented).
+       if (global_functions[intidx].f_func == NULL)
+           return (char_u *)"";
        STRCPY(IObuff, global_functions[intidx].f_name);
        STRCAT(IObuff, "(");
        if (global_functions[intidx].f_max_argc == 0)
*** ../vim-9.0.1217/src/testdir/test_cmdline.vim        2023-01-04 
18:59:53.457710839 +0000
--- src/testdir/test_cmdline.vim        2023-01-18 15:27:09.528158027 +0000
***************
*** 489,494 ****
--- 489,500 ----
    let l = getcompletion('paint', 'function')
    call assert_equal([], l)
  
+   if !has('ruby')
+     " global_functions[] has an entry but it doesn't have an implemention
+     let l = getcompletion('ruby', 'function')
+     call assert_equal([], l)
+   endif
+ 
    let Flambda = {-> 'hello'}
    let l = getcompletion('', 'function')
    let l = filter(l, {i, v -> v =~ 'lambda'})
*** ../vim-9.0.1217/src/version.c       2023-01-18 14:51:03.771305354 +0000
--- src/version.c       2023-01-18 15:24:46.564104335 +0000
***************
*** 697,698 ****
--- 697,700 ----
  {   /* Add new patch number below this line */
+ /**/
+     1218,
  /**/

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