From 339978ef3869acb2ff877451381a80ee4b548bfb Mon Sep 17 00:00:00 2001
From: John Hawthorn <john@hawthorn.email>
Date: Fri, 22 Dec 2023 12:15:07 -0800
Subject: [PATCH] Free default_rand_key after freeing Ractors

Ractor's free iterates through its TLS keys so we need to keep this
memory available until after Ractors are freed.

Minimal reproduction:

    RUBY_FREE_AT_EXIT=1 ./miniruby -e rand
---
 vm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/vm.c b/vm.c
index d2ec9a7f53..6334459579 100644
--- a/vm.c
+++ b/vm.c
@@ -2994,7 +2994,6 @@ ruby_vm_destruct(rb_vm_t *vm)
         rb_thread_t *th = vm->ractor.main_thread;
         VALUE *stack = th->ec->vm_stack;
         if (rb_free_at_exit) {
-            rb_free_default_rand_key();
             rb_free_encoded_insn_data();
             rb_free_global_enc_table();
             rb_free_loaded_builtin_table();
@@ -3056,6 +3055,7 @@ ruby_vm_destruct(rb_vm_t *vm)
             if (rb_free_at_exit) {
                 rb_objspace_free_objects(objspace);
                 rb_free_generic_iv_tbl_();
+                rb_free_default_rand_key();
                 if (th) {
                     xfree(stack);
                     ruby_mimfree(th);