vim-patch:9.1.0039: too vague errors for 'listchars'/'fillchars' (#27070)

Problem:  too vague errors for 'listchars'/'fillchars'
Solution: Include the field name in error message.
          (zeertzjq)

related: #27050
closes: vim/vim#13877

6a8d2e1634

Co-authored-by: Cole Frankenhoff <cole.nhf@gmail.com>

runtime/doc/options.txt

@@ -2485,7 +2485,7 @@ A jump table for the options with a short description can be found at |Q_op|.
 	Characters to fill the statuslines, vertical separators and special
 	lines in the window.
 	It is a comma-separated list of items.  Each item has a name, a colon
-	and the value of that item:
+	and the value of that item: |E1511|
 
 	  item		default		Used for ~
 	  stl		' '		statusline of the current window
@@ -2523,7 +2523,7 @@ A jump table for the options with a short description can be found at |Q_op|.
 <
 	For the "stl", "stlnc", "foldopen", "foldclose" and "foldsep" items
 	single-byte and multibyte characters are supported.  But double-width
-	characters are not supported.
+	characters are not supported. |E1512|
 
 	The highlighting used for these items:
 	  item		highlight group ~
@@ -3823,7 +3823,7 @@ A jump table for the options with a short description can be found at |Q_op|.
 'listchars' 'lcs'	string	(default "tab:> ,trail:-,nbsp:+")
 			global or local to window |global-local|
 	Strings to use in 'list' mode and for the |:list| command.  It is a
-	comma-separated list of string settings.
+	comma-separated list of string settings. *E1511*
 
 							*lcs-eol*
 	  eol:c		Character to show at the end of each line.  When
@@ -3902,7 +3902,7 @@ A jump table for the options with a short description can be found at |Q_op|.
 			omitted.
 
 	The characters ':' and ',' should not be used.  UTF-8 characters can
-	be used.  All characters must be single width.
+	be used.  All characters must be single width. *E1512*
 
 	Each character can be specified as hex: >vim
 		set listchars=eol:\\x24

runtime/lua/vim/_meta/options.lua

@@ -2197,7 +2197,7 @@ vim.bo.ft = vim.bo.filetype
 --- Characters to fill the statuslines, vertical separators and special
 --- lines in the window.
 --- It is a comma-separated list of items.  Each item has a name, a colon
---- and the value of that item:
+--- and the value of that item: `E1511`
 ---
 ---   item		default		Used for ~
 ---   stl		' '		statusline of the current window
@@ -2238,7 +2238,7 @@ vim.bo.ft = vim.bo.filetype
 ---
 --- For the "stl", "stlnc", "foldopen", "foldclose" and "foldsep" items
 --- single-byte and multibyte characters are supported.  But double-width
---- characters are not supported.
+--- characters are not supported. `E1512`
 ---
 --- The highlighting used for these items:
 ---   item		highlight group ~
@@ -3829,7 +3829,7 @@ vim.o.list = false
 vim.wo.list = vim.o.list
 
 --- Strings to use in 'list' mode and for the `:list` command.  It is a
---- comma-separated list of string settings.
+--- comma-separated list of string settings. *E1511*
 ---
 --- 						*lcs-eol*
 ---   eol:c		Character to show at the end of each line.  When
@@ -3921,7 +3921,7 @@ vim.wo.list = vim.o.list
 --- 		omitted.
 ---
 --- The characters ':' and ',' should not be used.  UTF-8 characters can
---- be used.  All characters must be single width.
+--- be used.  All characters must be single width. *E1512*
 ---
 --- Each character can be specified as hex:
 ---

src/nvim/option.c

@@ -1703,10 +1703,10 @@ static void didset_options2(void)
   highlight_changed();
 
   // Parse default for 'fillchars'.
-  set_chars_option(curwin, curwin->w_p_fcs, kFillchars, true);
+  set_chars_option(curwin, curwin->w_p_fcs, kFillchars, true, NULL, 0);
 
   // Parse default for 'listchars'.
-  set_chars_option(curwin, curwin->w_p_lcs, kListchars, true);
+  set_chars_option(curwin, curwin->w_p_lcs, kListchars, true, NULL, 0);
 
   // Parse default for 'wildmode'.
   check_opt_wim();
@@ -4998,8 +4998,8 @@ void didset_window_options(win_T *wp, bool valid_cursor)
   check_colorcolumn(wp);
   briopt_check(wp);
   fill_culopt_flags(NULL, wp);
-  set_chars_option(wp, wp->w_p_fcs, kFillchars, true);
+  set_chars_option(wp, wp->w_p_fcs, kFillchars, true, NULL, 0);
-  set_chars_option(wp, wp->w_p_lcs, kListchars, true);
+  set_chars_option(wp, wp->w_p_lcs, kListchars, true, NULL, 0);
   parse_winhl_opt(wp);  // sets w_hl_needs_update also for w_p_winbl
   check_blending(wp);
   set_winbar_win(wp, false, valid_cursor);

src/nvim/options.lua

@@ -2818,7 +2818,7 @@ return {
         Characters to fill the statuslines, vertical separators and special
         lines in the window.
         It is a comma-separated list of items.  Each item has a name, a colon
-        and the value of that item:
+        and the value of that item: |E1511|
 
           item		default		Used for ~
           stl		' '		statusline of the current window
@@ -2856,7 +2856,7 @@ return {
         <
         For the "stl", "stlnc", "foldopen", "foldclose" and "foldsep" items
         single-byte and multibyte characters are supported.  But double-width
-        characters are not supported.
+        characters are not supported. |E1512|
 
         The highlighting used for these items:
           item		highlight group ~
@@ -4879,7 +4879,7 @@ return {
       deny_duplicates = true,
       desc = [=[
         Strings to use in 'list' mode and for the |:list| command.  It is a
-        comma-separated list of string settings.
+        comma-separated list of string settings. *E1511*
 
         						*lcs-eol*
           eol:c		Character to show at the end of each line.  When
@@ -4958,7 +4958,7 @@ return {
         		omitted.
 
         The characters ':' and ',' should not be used.  UTF-8 characters can
-        be used.  All characters must be single width.
+        be used.  All characters must be single width. *E1512*
 
         Each character can be specified as hex: >vim
         	set listchars=eol:\\x24

src/nvim/optionstr.c

@@ -62,6 +62,10 @@ static const char e_backupext_and_patchmode_are_equal[]
   = N_("E589: 'backupext' and 'patchmode' are equal");
 static const char e_showbreak_contains_unprintable_or_wide_character[]
   = N_("E595: 'showbreak' contains unprintable or wide character");
+static const char e_wrong_number_of_characters_for_field_str[]
+  = N_("E1511: Wrong number of characters for field \"%s\"");
+static const char e_wrong_character_width_for_field_str[]
+  = N_("E1512: Wrong character width for field \"%s\"");
 
 static char *(p_ambw_values[]) = { "single", "double", NULL };
 static char *(p_bg_values[]) = { "light", "dark", NULL };
@@ -879,14 +883,16 @@ int expand_set_casemap(optexpand_T *args, int *numMatches, char ***matches)
 
 /// The global 'listchars' or 'fillchars' option is changed.
 static const char *did_set_global_chars_option(win_T *win, char *val, CharsOption what,
-                                               int opt_flags)
+                                               int opt_flags, char *errbuf, size_t errbuflen)
 {
   const char *errmsg = NULL;
   char **local_ptr = (what == kListchars) ? &win->w_p_lcs : &win->w_p_fcs;
 
   // only apply the global value to "win" when it does not have a
   // local value
-  errmsg = set_chars_option(win, val, what, **local_ptr == NUL || !(opt_flags & OPT_GLOBAL));
+  errmsg = set_chars_option(win, val, what,
+                            **local_ptr == NUL || !(opt_flags & OPT_GLOBAL),
+                            errbuf, errbuflen);
   if (errmsg != NULL) {
     return errmsg;
   }
@@ -904,7 +910,7 @@ static const char *did_set_global_chars_option(win_T *win, char *val, CharsOptio
     // here, so ignore the return value.
     char *opt = (what == kListchars) ? wp->w_p_lcs : wp->w_p_fcs;
     if (*opt == NUL) {
-      set_chars_option(wp, opt, what, true);
+      set_chars_option(wp, opt, what, true, errbuf, errbuflen);
     }
   }
 
@@ -921,13 +927,17 @@ const char *did_set_chars_option(optset_T *args)
   const char *errmsg = NULL;
 
   if (varp == &p_lcs) {      // global 'listchars'
-    errmsg = did_set_global_chars_option(win, *varp, kListchars, args->os_flags);
+    errmsg = did_set_global_chars_option(win, *varp, kListchars, args->os_flags,
+                                         args->os_errbuf, args->os_errbuflen);
   } else if (varp == &p_fcs) {  // global 'fillchars'
-    errmsg = did_set_global_chars_option(win, *varp, kFillchars, args->os_flags);
+    errmsg = did_set_global_chars_option(win, *varp, kFillchars, args->os_flags,
+                                         args->os_errbuf, args->os_errbuflen);
   } else if (varp == &win->w_p_lcs) {  // local 'listchars'
-    errmsg = set_chars_option(win, *varp, kListchars, true);
+    errmsg = set_chars_option(win, *varp, kListchars, true,
+                              args->os_errbuf, args->os_errbuflen);
   } else if (varp == &win->w_p_fcs) {  // local 'fillchars'
-    errmsg = set_chars_option(win, *varp, kFillchars, true);
+    errmsg = set_chars_option(win, *varp, kFillchars, true,
+                              args->os_errbuf, args->os_errbuflen);
   }
 
   return errmsg;
@@ -2668,14 +2678,27 @@ static const struct chars_tab lcs_tab[] = {
   { NULL,               "leadmultispace", NULL, NULL },
 };
 
+static char *field_value_err(char *errbuf, size_t errbuflen, const char *fmt, const char *field)
+{
+  if (errbuf == NULL) {
+    return "";
+  }
+  vim_snprintf(errbuf, errbuflen, _(fmt), field);
+  return errbuf;
+}
+
 /// Handle setting 'listchars' or 'fillchars'.
 /// Assume monocell characters
 ///
-/// @param value  points to either the global or the window-local value.
+/// @param value      points to either the global or the window-local value.
-/// @param what   kListchars or kFillchars
+/// @param what       kListchars or kFillchars
-/// @param apply  if false, do not store the flags, only check for errors.
+/// @param apply      if false, do not store the flags, only check for errors.
+/// @param errbuf     buffer for error message, can be NULL if it won't be used.
+/// @param errbuflen  size of error buffer.
+///
 /// @return error message, NULL if it's OK.
-const char *set_chars_option(win_T *wp, const char *value, CharsOption what, bool apply)
+const char *set_chars_option(win_T *wp, const char *value, CharsOption what, bool apply,
+                             char *errbuf, size_t errbuflen)
 {
   const char *last_multispace = NULL;   // Last occurrence of "multispace:"
   const char *last_lmultispace = NULL;  // Last occurrence of "leadmultispace:"
@@ -2736,9 +2759,7 @@ const char *set_chars_option(win_T *wp, const char *value, CharsOption what, boo
       int i;
       for (i = 0; i < entries; i++) {
         const size_t len = strlen(tab[i].name);
-        if (!(strncmp(p, tab[i].name, len) == 0
+        if (!(strncmp(p, tab[i].name, len) == 0 && p[len] == ':')) {
-              && p[len] == ':'
-              && p[len + 1] != NUL)) {
           continue;
         }
 
@@ -2751,13 +2772,17 @@ const char *set_chars_option(win_T *wp, const char *value, CharsOption what, boo
             while (*s != NUL && *s != ',') {
               schar_T c1 = get_encoded_char_adv(&s);
               if (c1 == 0) {
-                return e_invarg;
+                return field_value_err(errbuf, errbuflen,
+                                       e_wrong_character_width_for_field_str,
+                                       tab[i].name);
               }
               multispace_len++;
             }
             if (multispace_len == 0) {
               // lcs-multispace cannot be an empty string
-              return e_invarg;
+              return field_value_err(errbuf, errbuflen,
+                                     e_wrong_number_of_characters_for_field_str,
+                                     tab[i].name);
             }
             p = s;
           } else {
@@ -2782,13 +2807,17 @@ const char *set_chars_option(win_T *wp, const char *value, CharsOption what, boo
             while (*s != NUL && *s != ',') {
               schar_T c1 = get_encoded_char_adv(&s);
               if (c1 == 0) {
-                return e_invarg;
+                return field_value_err(errbuf, errbuflen,
+                                       e_wrong_character_width_for_field_str,
+                                       tab[i].name);
               }
               lead_multispace_len++;
             }
             if (lead_multispace_len == 0) {
               // lcs-leadmultispace cannot be an empty string
-              return e_invarg;
+              return field_value_err(errbuf, errbuflen,
+                                     e_wrong_number_of_characters_for_field_str,
+                                     tab[i].name);
             }
             p = s;
           } else {
@@ -2805,24 +2834,37 @@ const char *set_chars_option(win_T *wp, const char *value, CharsOption what, boo
         }
 
         const char *s = p + len + 1;
+        if (*s == NUL) {
+          return field_value_err(errbuf, errbuflen,
+                                 e_wrong_number_of_characters_for_field_str,
+                                 tab[i].name);
+        }
         schar_T c1 = get_encoded_char_adv(&s);
         if (c1 == 0) {
-          return e_invarg;
+          return field_value_err(errbuf, errbuflen,
+                                 e_wrong_character_width_for_field_str,
+                                 tab[i].name);
         }
         schar_T c2 = 0;
         schar_T c3 = 0;
         if (tab[i].cp == &lcs_chars.tab2) {
           if (*s == NUL) {
-            return e_invarg;
+            return field_value_err(errbuf, errbuflen,
+                                   e_wrong_number_of_characters_for_field_str,
+                                   tab[i].name);
           }
           c2 = get_encoded_char_adv(&s);
           if (c2 == 0) {
-            return e_invarg;
+            return field_value_err(errbuf, errbuflen,
+                                   e_wrong_character_width_for_field_str,
+                                   tab[i].name);
           }
           if (!(*s == ',' || *s == NUL)) {
             c3 = get_encoded_char_adv(&s);
             if (c3 == 0) {
-              return e_invarg;
+              return field_value_err(errbuf, errbuflen,
+                                     e_wrong_character_width_for_field_str,
+                                     tab[i].name);
             }
           }
         }
@@ -2839,6 +2881,10 @@ const char *set_chars_option(win_T *wp, const char *value, CharsOption what, boo
           }
           p = s;
           break;
+        } else {
+          return field_value_err(errbuf, errbuflen,
+                                 e_wrong_number_of_characters_for_field_str,
+                                 tab[i].name);
         }
       }
 
@@ -2893,17 +2939,17 @@ char *get_listchars_name(expand_T *xp FUNC_ATTR_UNUSED, int idx)
 /// @return  an untranslated error message if any of them is invalid, NULL otherwise.
 const char *check_chars_options(void)
 {
-  if (set_chars_option(curwin, p_lcs, kListchars, false) != NULL) {
+  if (set_chars_option(curwin, p_lcs, kListchars, false, NULL, 0) != NULL) {
     return e_conflicts_with_value_of_listchars;
   }
-  if (set_chars_option(curwin, p_fcs, kFillchars, false) != NULL) {
+  if (set_chars_option(curwin, p_fcs, kFillchars, false, NULL, 0) != NULL) {
     return e_conflicts_with_value_of_fillchars;
   }
   FOR_ALL_TAB_WINDOWS(tp, wp) {
-    if (set_chars_option(wp, wp->w_p_lcs, kListchars, true) != NULL) {
+    if (set_chars_option(wp, wp->w_p_lcs, kListchars, true, NULL, 0) != NULL) {
       return e_conflicts_with_value_of_listchars;
     }
-    if (set_chars_option(wp, wp->w_p_fcs, kFillchars, true) != NULL) {
+    if (set_chars_option(wp, wp->w_p_fcs, kFillchars, true, NULL, 0) != NULL) {
       return e_conflicts_with_value_of_fillchars;
     }
   }

test/functional/options/chars_spec.lua

@@ -1,9 +1,9 @@
 local helpers = require('test.functional.helpers')(after_each)
 local Screen = require('test.functional.ui.screen')
 local clear, command = helpers.clear, helpers.command
+local pcall_err = helpers.pcall_err
 local eval = helpers.eval
 local eq = helpers.eq
-local exc_exec = helpers.exc_exec
 local insert = helpers.insert
 local feed = helpers.feed
 local api = helpers.api
@@ -17,11 +17,6 @@ describe("'fillchars'", function()
     screen:attach()
   end)
 
-  local function shouldfail(val, errval)
-    errval = errval or val
-    eq('Vim(set):E474: Invalid argument: fillchars=' .. errval, exc_exec('set fillchars=' .. val))
-  end
-
   describe('"eob" flag', function()
     it("uses '~' by default", function()
       eq('', eval('&fillchars'))
@@ -64,10 +59,22 @@ describe("'fillchars'", function()
     end)
 
     it('handles invalid values', function()
-      shouldfail('eob:') -- empty string
+      eq(
-      shouldfail('eob:馬') -- doublewidth char
+        'Vim(set):E1511: Wrong number of characters for field "eob": fillchars=eob:',
-      shouldfail('eob:xy') -- two ascii chars
+        pcall_err(command, 'set fillchars=eob:') -- empty string
-      shouldfail('eob:\255', 'eob:<ff>') -- invalid UTF-8
+      )
+      eq(
+        'Vim(set):E1512: Wrong character width for field "eob": fillchars=eob:馬',
+        pcall_err(command, 'set fillchars=eob:馬') -- doublewidth char
+      )
+      eq(
+        'Vim(set):E1511: Wrong number of characters for field "eob": fillchars=eob:xy',
+        pcall_err(command, 'set fillchars=eob:xy') -- two ascii chars
+      )
+      eq(
+        'Vim(set):E1512: Wrong character width for field "eob": fillchars=eob:<ff>',
+        pcall_err(command, 'set fillchars=eob:\255') -- invalid UTF-8
+      )
     end)
   end)
 

test/old/testdir/test_display.vim

@@ -253,12 +253,12 @@ func Test_eob_fillchars()
   " default value
   " call assert_match('eob:\~', &fillchars)
   " invalid values
-  call assert_fails(':set fillchars=eob:', 'E474:')
+  call assert_fails(':set fillchars=eob:', 'E1511:')
-  call assert_fails(':set fillchars=eob:xy', 'E474:')
+  call assert_fails(':set fillchars=eob:xy', 'E1511:')
-  call assert_fails(':set fillchars=eob:\255', 'E474:')
+  call assert_fails(':set fillchars=eob:\255', 'E1511:')
-  call assert_fails(':set fillchars=eob:<ff>', 'E474:')
+  call assert_fails(':set fillchars=eob:<ff>', 'E1511:')
-  call assert_fails(":set fillchars=eob:\x01", 'E474:')
+  call assert_fails(":set fillchars=eob:\x01", 'E1512:')
-  call assert_fails(':set fillchars=eob:\\x01', 'E474:')
+  call assert_fails(':set fillchars=eob:\\x01', 'E1512:')
   " default is ~
   new
   redraw
@@ -412,14 +412,16 @@ func Run_Test_display_lastline(euro)
   call StopVimInTerminal(buf)
 endfunc
 
-func Test_display_lastline()
+func Test_display_lastline_dump()
   CheckScreendump
 
   call Run_Test_display_lastline('')
   call Run_Test_display_lastline('euro_')
+endfunc
 
-  call assert_fails(':set fillchars=lastline:', 'E474:')
+func Test_display_lastline_fails()
-  call assert_fails(':set fillchars=lastline:〇', 'E474:')
+  call assert_fails(':set fillchars=lastline:', 'E1511:')
+  call assert_fails(':set fillchars=lastline:〇', 'E1512:')
 endfunc
 
 func Test_display_long_lastline()

test/old/testdir/test_listchars.vim

@@ -429,52 +429,52 @@ func Test_listchars_invalid()
   call assert_fails('set listchars=leadmultispace', 'E474:')
 
   " Too short
-  call assert_fails('set listchars=space:', 'E474:')
+  call assert_fails('set listchars=space:', 'E1511:')
-  call assert_fails('set listchars=tab:x', 'E474:')
+  call assert_fails('set listchars=tab:x', 'E1511:')
-  call assert_fails('set listchars=multispace:', 'E474:')
+  call assert_fails('set listchars=multispace:', 'E1511:')
-  call assert_fails('set listchars=leadmultispace:', 'E474:')
+  call assert_fails('set listchars=leadmultispace:', 'E1511:')
 
   " One occurrence too short
-  call assert_fails('set listchars=space:,space:x', 'E474:')
+  call assert_fails('set listchars=space:x,space:', 'E1511:')
-  call assert_fails('set listchars=space:x,space:', 'E474:')
+  call assert_fails('set listchars=space:,space:x', 'E1511:')
-  call assert_fails('set listchars=tab:x,tab:xx', 'E474:')
+  call assert_fails('set listchars=tab:xx,tab:x', 'E1511:')
-  call assert_fails('set listchars=tab:xx,tab:x', 'E474:')
+  call assert_fails('set listchars=tab:x,tab:xx', 'E1511:')
-  call assert_fails('set listchars=multispace:,multispace:x', 'E474:')
+  call assert_fails('set listchars=multispace:,multispace:x', 'E1511:')
-  call assert_fails('set listchars=multispace:x,multispace:', 'E474:')
+  call assert_fails('set listchars=multispace:x,multispace:', 'E1511:')
-  call assert_fails('set listchars=leadmultispace:,leadmultispace:x', 'E474:')
+  call assert_fails('set listchars=leadmultispace:,leadmultispace:x', 'E1511:')
-  call assert_fails('set listchars=leadmultispace:x,leadmultispace:', 'E474:')
+  call assert_fails('set listchars=leadmultispace:x,leadmultispace:', 'E1511:')
 
   " Too long
-  call assert_fails('set listchars=space:xx', 'E474:')
+  call assert_fails('set listchars=space:xx', 'E1511:')
-  call assert_fails('set listchars=tab:xxxx', 'E474:')
+  call assert_fails('set listchars=tab:xxxx', 'E1511:')
 
   " Has double-width character
-  call assert_fails('set listchars=space:·', 'E474:')
+  call assert_fails('set listchars=space:·', 'E1512:')
-  call assert_fails('set listchars=tab:·x', 'E474:')
+  call assert_fails('set listchars=tab:·x', 'E1512:')
-  call assert_fails('set listchars=tab:x·', 'E474:')
+  call assert_fails('set listchars=tab:x·', 'E1512:')
-  call assert_fails('set listchars=tab:xx·', 'E474:')
+  call assert_fails('set listchars=tab:xx·', 'E1512:')
-  call assert_fails('set listchars=multispace:·', 'E474:')
+  call assert_fails('set listchars=multispace:·', 'E1512:')
-  call assert_fails('set listchars=multispace:xxx·', 'E474:')
+  call assert_fails('set listchars=multispace:xxx·', 'E1512:')
-  call assert_fails('set listchars=leadmultispace:·', 'E474:')
+  call assert_fails('set listchars=leadmultispace:·', 'E1512:')
-  call assert_fails('set listchars=leadmultispace:xxx·', 'E474:')
+  call assert_fails('set listchars=leadmultispace:xxx·', 'E1512:')
 
   " Has control character
-  call assert_fails("set listchars=space:\x01", 'E474:')
+  call assert_fails("set listchars=space:\x01", 'E1512:')
-  call assert_fails("set listchars=tab:\x01x", 'E474:')
+  call assert_fails("set listchars=tab:\x01x", 'E1512:')
-  call assert_fails("set listchars=tab:x\x01", 'E474:')
+  call assert_fails("set listchars=tab:x\x01", 'E1512:')
-  call assert_fails("set listchars=tab:xx\x01", 'E474:')
+  call assert_fails("set listchars=tab:xx\x01", 'E1512:')
-  call assert_fails("set listchars=multispace:\x01", 'E474:')
+  call assert_fails("set listchars=multispace:\x01", 'E1512:')
-  call assert_fails("set listchars=multispace:xxx\x01", 'E474:')
+  call assert_fails("set listchars=multispace:xxx\x01", 'E1512:')
-  call assert_fails('set listchars=space:\\x01', 'E474:')
+  call assert_fails('set listchars=space:\\x01', 'E1512:')
-  call assert_fails('set listchars=tab:\\x01x', 'E474:')
+  call assert_fails('set listchars=tab:\\x01x', 'E1512:')
-  call assert_fails('set listchars=tab:x\\x01', 'E474:')
+  call assert_fails('set listchars=tab:x\\x01', 'E1512:')
-  call assert_fails('set listchars=tab:xx\\x01', 'E474:')
+  call assert_fails('set listchars=tab:xx\\x01', 'E1512:')
-  call assert_fails('set listchars=multispace:\\x01', 'E474:')
+  call assert_fails('set listchars=multispace:\\x01', 'E1512:')
-  call assert_fails('set listchars=multispace:xxx\\x01', 'E474:')
+  call assert_fails('set listchars=multispace:xxx\\x01', 'E1512:')
-  call assert_fails("set listchars=leadmultispace:\x01", 'E474:')
+  call assert_fails("set listchars=leadmultispace:\x01", 'E1512:')
-  call assert_fails('set listchars=leadmultispace:\\x01', 'E474:')
+  call assert_fails('set listchars=leadmultispace:\\x01', 'E1512:')
-  call assert_fails("set listchars=leadmultispace:xxx\x01", 'E474:')
+  call assert_fails("set listchars=leadmultispace:xxx\x01", 'E1512:')
-  call assert_fails('set listchars=leadmultispace:xxx\\x01', 'E474:')
+  call assert_fails('set listchars=leadmultispace:xxx\\x01', 'E1512:')
 
   enew!
   set ambiwidth& listchars& ff&