From 417c648f084713e2d6fd8d6d267a7114b711ba70 Mon Sep 17 00:00:00 2001
From: Aaron Patterson <tenderlove@ruby-lang.org>
Date: Tue, 23 Mar 2021 12:02:27 -0700
Subject: [PATCH] Free iv index table

IV index tables weren't being freed.  This program would leak memory:

```ruby
loop do
  k = Class.new do
    def initialize
      @a = 1
      @b = 1
      @c = 1
      @d = 1
      @e = 1
      @f = 1
      @g = 1
    end
  end
  k.new
end
```

This commit fixes the leak.
---
 gc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/gc.c b/gc.c
index 1f161b81f4..f7deedcbcd 100644
--- a/gc.c
+++ b/gc.c
@@ -2628,6 +2628,7 @@ static void
 iv_index_tbl_free(struct st_table *tbl)
 {
     st_foreach(tbl, free_iv_index_tbl_free_i, 0);
+    st_free_table(tbl);
 }
 
 // alive: if false, target pointers can be freed already.