From 03a0ade90d334a616fb5b2d1ed4147a3035ca081 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Wed, 17 Jul 2024 15:16:21 +0900
Subject: [PATCH] Fix double free when `getcwd` does not allocate buffer

Do not free the result at normal return from `ruby_getcwd`.
---
 util.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/util.c b/util.c
index 8a18814937..2e887618b1 100644
--- a/util.c
+++ b/util.c
@@ -564,7 +564,7 @@ ruby_getcwd(void)
         rb_imemo_tmpbuf_set_ptr(guard, buf);
         buf = xrealloc(buf, size);
     }
-    rb_free_tmp_buffer(&guard);
+    rb_imemo_tmpbuf_set_ptr(guard, NULL);
     return buf;
 }