patch 8.2.0612: Vim9: no check for space before #comment

Problem:    Vim9: no check for space before #comment.
Solution:   Add space checks.

src/ex_cmds.c

@@ -451,12 +451,9 @@ ex_sort(exarg_T *eap)
 	}
 	else if (!ASCII_ISALPHA(*p) && regmatch.regprog == NULL)
 	{
-	    s = skip_regexp(p + 1, *p, TRUE);
+	    s = skip_regexp_err(p + 1, *p, TRUE);
-	    if (*s != *p)
+	    if (s == NULL)
-	    {
-		emsg(_(e_invalpat));
 		goto sortend;
-	    }
 	    *s = NUL;
 	    // Use last search pattern if sort pattern is empty.
 	    if (s == p + 1)

src/ex_eval.c

@@ -1021,12 +1021,12 @@ ex_else(exarg_T *eap)
     if (eap->cmdidx == CMD_elseif)
     {
 	result = eval_to_bool(eap->arg, &error, &eap->nextcmd, skip);
+
 	// When throwing error exceptions, we want to throw always the first
 	// of several errors in a row.  This is what actually happens when
 	// a conditional error was detected above and there is another failure
 	// when parsing the expression.  Since the skip flag is set in this
 	// case, the parsing error will be ignored by emsg().
-
 	if (!skip && !error)
 	{
 	    if (result)
@@ -1518,7 +1518,7 @@ ex_catch(exarg_T *eap)
 						       &cstack->cs_looplevel);
     }
 
-    if (ends_excmd(*eap->arg))	// no argument, catch all errors
+    if (ends_excmd2(eap->cmd, eap->arg))   // no argument, catch all errors
     {
 	pat = (char_u *)".*";
 	end = NULL;
@@ -1527,7 +1527,9 @@ ex_catch(exarg_T *eap)
     else
     {
 	pat = eap->arg + 1;
-	end = skip_regexp(pat, *eap->arg, TRUE);
+	end = skip_regexp_err(pat, *eap->arg, TRUE);
+	if (end == NULL)
+	    give_up = TRUE;
     }
 
     if (!give_up)
@@ -1548,7 +1550,8 @@ ex_catch(exarg_T *eap)
 	if (!skip && (cstack->cs_flags[idx] & CSF_THROWN)
 		&& !(cstack->cs_flags[idx] & CSF_CAUGHT))
 	{
-	    if (end != NULL && *end != NUL && !ends_excmd(*skipwhite(end + 1)))
+	    if (end != NULL && *end != NUL
+				      && !ends_excmd2(end, skipwhite(end + 1)))
 	    {
 		emsg(_(e_trailing));
 		return;

src/gui.c

@@ -5036,7 +5036,7 @@ ex_gui(exarg_T *eap)
 	// of the argument ending up after the shell prompt.
 	msg_clr_eos_force();
 #ifdef GUI_MAY_SPAWN
-	if (!ends_excmd(*eap->arg))
+	if (!ends_excmd2(eap->cmd, eap->arg))
 	    gui_start(eap->arg);
 	else
 #endif
@@ -5045,7 +5045,7 @@ ex_gui(exarg_T *eap)
 	channel_gui_register_all();
 #endif
     }
-    if (!ends_excmd(*eap->arg))
+    if (!ends_excmd2(eap->cmd, eap->arg))
 	ex_next(eap);
 }
 

src/highlight.c

@@ -658,7 +658,7 @@ do_highlight(
     /*
      * If no argument, list current highlighting.
      */
-    if (ends_excmd(*line))
+    if (!init && ends_excmd2(line - 1, line))
     {
 	for (i = 1; i <= highlight_ga.ga_len && !got_int; ++i)
 	    // TODO: only call when the group has attributes set

src/proto/regexp.pro

@@ -1,6 +1,7 @@
 /* regexp.c */
 int re_multiline(regprog_T *prog);
-char_u *skip_regexp(char_u *startp, int dirc, int magic);
+char_u *skip_regexp(char_u *startp, int delim, int magic);
+char_u *skip_regexp_err(char_u *startp, int delim, int magic);
 char_u *skip_regexp_ex(char_u *startp, int dirc, int magic, char_u **newp, int *dropped);
 reg_extmatch_T *ref_extmatch(reg_extmatch_T *em);
 void unref_extmatch(reg_extmatch_T *em);

src/regexp.c

@@ -534,17 +534,37 @@ skip_anyof(char_u *p)
 
 /*
  * Skip past regular expression.
- * Stop at end of "startp" or where "dirc" is found ('/', '?', etc).
+ * Stop at end of "startp" or where "delim" is found ('/', '?', etc).
  * Take care of characters with a backslash in front of it.
  * Skip strings inside [ and ].
  */
     char_u *
 skip_regexp(
     char_u	*startp,
-    int		dirc,
+    int		delim,
     int		magic)
 {
-    return skip_regexp_ex(startp, dirc, magic, NULL, NULL);
+    return skip_regexp_ex(startp, delim, magic, NULL, NULL);
+}
+
+/*
+ * Call skip_regexp() and when the delimiter does not match give an error and
+ * return NULL.
+ */
+    char_u *
+skip_regexp_err(
+    char_u	*startp,
+    int		delim,
+    int		magic)
+{
+    char_u *p = skip_regexp(startp, delim, magic);
+
+    if (*p != delim)
+    {
+	semsg(_("E654: missing delimiter after search pattern: %s"), startp);
+	return NULL;
+    }
+    return p;
 }
 
 /*

src/testdir/test_sort.vim

@@ -1255,7 +1255,7 @@ func Test_sort_cmd()
   call setline(1, ['line1', 'line2'])
   call assert_fails('sort no', 'E474:')
   call assert_fails('sort c', 'E475:')
-  call assert_fails('sort #pat%', 'E682:')
+  call assert_fails('sort #pat%', 'E654:')
 
   enew!
 endfunc

src/testdir/test_vim9_script.vim

@@ -1153,22 +1153,76 @@ def Test_vim9_comment()
 
   CheckDefFailure([
       'try# comment',
-      'echo "yes"',
+      '  echo "yes"',
       'catch',
       'endtry',
       ], 'E488:')
+  CheckScriptFailure([
+      'vim9script',
+      'try# comment',
+      'echo "yes"',
+      ], 'E488:')
   CheckDefFailure([
       'try',
-      'echo "yes"',
+      '  echo "yes"',
       'catch# comment',
       'endtry',
       ], 'E488:')
+  CheckScriptFailure([
+      'vim9script',
+      'try',
+      '  echo "yes"',
+      'catch# comment',
+      'endtry',
+      ], 'E654:')
+  CheckDefFailure([
+      'try',
+      '  echo "yes"',
+      'catch /pat/# comment',
+      'endtry',
+      ], 'E488:')
+  CheckScriptFailure([
+      'vim9script',
+      'try',
+      '  throw "pat"',
+      'catch /pat/# comment',
+      'endtry',
+      ], 'E605:')
   CheckDefFailure([
       'try',
       'echo "yes"',
       'catch',
       'endtry# comment',
       ], 'E488:')
+  CheckScriptFailure([
+      'vim9script',
+      'try',
+      '  echo "yes"',
+      'catch',
+      'endtry# comment',
+      ], 'E600:')
+
+  CheckScriptSuccess([
+      'vim9script',
+      'hi # comment',
+      ])
+  CheckScriptFailure([
+      'vim9script',
+      'hi# comment',
+      ], 'E416:')
+enddef
+
+def Test_vim9_comment_gui()
+  CheckCanRunGui
+
+  CheckScriptFailure([
+      'vim9script',
+      'gui#comment'
+      ], 'E499:')
+  CheckScriptFailure([
+      'vim9script',
+      'gui -f#comment'
+      ], 'E499:')
 enddef
 
 def Test_vim9_comment_not_compiled()

src/version.c

@@ -746,6 +746,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    612,
 /**/
     611,
 /**/