https://git.ruby-lang.org/ruby.git/commit/?id=53ff2d791d

From 53ff2d791d5e2c303a61d5873bcd03007366be88 Mon Sep 17 00:00:00 2001
From: Maxime Chevalier-Boisvert <maxime.chevalierboisvert@s...>
Date: Fri, 9 Apr 2021 14:48:02 -0400
Subject: Fix bug in ctx_set_local_type()

---
 yjit_core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/yjit_core.c b/yjit_core.c
index 9469616947..68d4f976a3 100644
--- a/yjit_core.c
+++ b/yjit_core.c
@@ -202,7 +202,7 @@ Set the type of a local variable https://github.com/ruby/ruby/blob/trunk/yjit_core.c#L202
 */
 void ctx_set_local_type(ctx_t* ctx, size_t idx, val_type_t type)
 {
-    if (ctx->stack_size > MAX_LOCAL_TYPES)
+    if (idx >= MAX_LOCAL_TYPES)
         return;
 
     ctx->local_types[idx] = type;
-- 
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