Squashed commit of the following: [Backport #16516]

commit c98c492578d898dc07a04b8240d8d5b1508ffafa
Author: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date:   Fri Jan 17 16:56:53 2020 +0900

    Added test for f38b3e8c707ebdcad05aa9485cf1760640b74fbb

commit f38b3e8c707ebdcad05aa9485cf1760640b74fbb
Author: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date:   Thu Jan 16 18:34:31 2020 +0900

    Fixed the location of args node with numbered parameter

1 files changed, 5 insertions, 1 deletions

diff --git a/parse.y b/parse.y
index 1281eb6258..16c464e49e 100644
--- a/parse.y
+++ b/parse.y
@@ -11377,7 +11377,11 @@ static NODE *
 args_with_numbered(struct parser_params *p, NODE *args, int max_numparam)
 {
     if (max_numparam > NO_PARAM) {
-	if (!args) args = new_args_tail(p, 0, 0, 0, 0);
+	if (!args) {
+	    YYLTYPE loc = RUBY_INIT_YYLLOC();
+	    args = new_args_tail(p, 0, 0, 0, 0);
+	    nd_set_loc(args, &loc);
+	}
 	args->nd_ainfo->pre_args_num = max_numparam;
     }
     return args;