From 95e29b0423450447ea0adbf06564969f0e437673 Mon Sep 17 00:00:00 2001
From: Mike Dalessio <mike.dalessio@gmail.com>
Date: Mon, 21 Aug 2023 14:47:24 -0400
Subject: [PATCH] [ruby/yarp] fix: avoid invalid memory read when CR is present
 without LF

https://github.com/ruby/yarp/commit/2296c037de
---
 yarp/yarp.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/yarp/yarp.c b/yarp/yarp.c
index 65c9e959fd..3f250abfe4 100644
--- a/yarp/yarp.c
+++ b/yarp/yarp.c
@@ -6183,7 +6183,9 @@ parser_lex(yp_parser_t *parser) {
                                 parser->current.end++;
                             }
 
-                            yp_newline_list_check_append(&parser->newline_list, parser->current.end);
+                            if (peek(parser) == '\n') {
+                                yp_newline_list_append(&parser->newline_list, parser->current.end);
+                            }
 
                             parser->current.end++;
                             if (parser->current.end < parser->end) {
@@ -6191,7 +6193,7 @@ parser_lex(yp_parser_t *parser) {
                             }
                         }
 
-                        switch (*parser->current.end) {
+                        switch (peek(parser)) {
                             case 'i': {
                                 parser->current.end++;