patch 8.2.1243: Vim9: cannot have a comment line halfway a list

Problem:    Vim9: cannot have a comment or empty line halfway a list at script
            level.
Solution:   Skip more than one line if needed.

src/eval.c

@@ -1913,7 +1913,7 @@ eval_next_non_blank(char_u *arg, evalarg_T *evalarg, int *getnext)
 	    && evalarg != NULL
 	    && (evalarg->eval_cookie != NULL || evalarg->eval_cctx != NULL)
 	    && (*arg == NUL || (VIM_ISWHITE(arg[-1])
-					     && *arg == '#' && arg[1] != '{')))
+						  && vim9_comment_start(arg))))
     {
 	char_u *p;
 

src/proto/vim9compile.pro

@@ -11,6 +11,7 @@ char *vartype_name(vartype_T type);
 char *type_name(type_T *type, char **tofree);
 int get_script_item_idx(int sid, char_u *name, int check_writable);
 imported_T *find_imported(char_u *name, size_t len, cctx_T *cctx);
+int vim9_comment_start(char_u *p);
 char_u *peek_next_line_from_context(cctx_T *cctx);
 char_u *next_line_from_context(cctx_T *cctx, int skip_comment);
 char_u *to_name_const_end(char_u *arg);

src/scriptfile.c

@@ -1763,10 +1763,13 @@ getsourceline(int c UNUSED, void *cookie, int indent UNUSED, int do_concat)
 	// backslash. We always need to read the next line, keep it in
 	// sp->nextline.
 	/* Also check for a comment in between continuation lines: "\ */
+	// Also check for a Vim9 comment and empty line.
 	sp->nextline = get_one_sourceline(sp);
 	if (sp->nextline != NULL
 		&& (*(p = skipwhite(sp->nextline)) == '\\'
-			      || (p[0] == '"' && p[1] == '\\' && p[2] == ' ')))
+			      || (p[0] == '"' && p[1] == '\\' && p[2] == ' ')
+			      || (in_vim9script()
+				  && (*p == NUL || vim9_comment_start(p)))))
 	{
 	    garray_T    ga;
 
@@ -1794,8 +1797,11 @@ getsourceline(int c UNUSED, void *cookie, int indent UNUSED, int do_concat)
 		    }
 		    ga_concat(&ga, p + 1);
 		}
-		else if (p[0] != '"' || p[1] != '\\' || p[2] != ' ')
+		else if (!(p[0] == '"' && p[1] == '\\' && p[2] == ' ')
+			&& !(in_vim9script()
+				      && (*p == NUL || vim9_comment_start(p))))
 		    break;
+		/* drop a # comment or "\ comment line */
 	    }
 	    ga_append(&ga, NUL);
 	    vim_free(line);

src/version.c

@@ -754,6 +754,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1243,
 /**/
     1242,
 /**/

src/vim9compile.c

@@ -2463,7 +2463,7 @@ free_imported(cctx_T *cctx)
 /*
  * Return TRUE if "p" points at a "#" but not at "#{".
  */
-    static int
+    int
 vim9_comment_start(char_u *p)
 {
     return p[0] == '#' && p[1] != '{';