From b879528e24272d8fbe41fe0e4e07cadcca5b643c Mon Sep 17 00:00:00 2001
From: Kevin Newton <kddnewton@gmail.com>
Date: Wed, 21 Jun 2023 11:25:13 -0400
Subject: [PATCH] [ruby/yarp] Do not leak memory from lex modes

https://github.com/ruby/yarp/commit/df6661740c
---
 yarp/yarp.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/yarp/yarp.c b/yarp/yarp.c
index db9a7ba562..0475c44836 100644
--- a/yarp/yarp.c
+++ b/yarp/yarp.c
@@ -12841,6 +12841,10 @@ yp_parser_free(yp_parser_t *parser) {
     yp_comment_list_free(&parser->comment_list);
     yp_constant_pool_free(&parser->constant_pool);
     yp_newline_list_free(&parser->newline_list);
+
+    while (parser->lex_modes.index >= YP_LEX_STACK_SIZE) {
+        lex_mode_pop(parser);
+    }
 }
 
 // Parse the Ruby source associated with the given parser and return the tree.