https://git.ruby-lang.org/ruby.git/commit/?id=f69a969544

From f69a969544d5a3af5c9454aabd953517266ad150 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Wed, 16 Mar 2022 18:41:45 +0900
Subject: Fix potential memory leak at fiber pool

Do not "allocate then wrap".  It leaks the allocated memory if
failed to create the wrapper.
---
 cont.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/cont.c b/cont.c
index ab9c8c9e49..667e6846b3 100644
--- a/cont.c
+++ b/cont.c
@@ -2845,9 +2845,9 @@ static const rb_data_type_t FiberPoolDataType = { https://github.com/ruby/ruby/blob/trunk/cont.c#L2845
 static VALUE
 fiber_pool_alloc(VALUE klass)
 {
-    struct fiber_pool * fiber_pool = RB_ALLOC(struct fiber_pool);
+    struct fiber_pool *fiber_pool;
 
-    return TypedData_Wrap_Struct(klass, &FiberPoolDataType, fiber_pool);
+    return TypedData_Make_Struct(klass, struct fiber_pool, &FiberPoolDataType, fiber_pool);
 }
 
 static VALUE
-- 
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