https://git.ruby-lang.org/ruby.git/commit/?id=d2f663d6f1

From d2f663d6f185f62ef019434caf9bd6afd63849d4 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Fri, 31 May 2019 10:05:38 +0900
Subject: STATIC_ASSERT for VM_METHOD_TYPE_MINIMUM_BITS


diff --git a/method.h b/method.h
index 2a6d85a..a604554 100644
--- a/method.h
+++ b/method.h
@@ -115,7 +115,8 @@ typedef enum { https://github.com/ruby/ruby/blob/trunk/method.h#L115
     END_OF_ENUMERATION(VM_METHOD_TYPE)
 } rb_method_type_t;
 #define VM_METHOD_TYPE_MINIMUM_BITS 4
-/* TODO: STATIC_ASSERT for VM_METHOD_TYPE_MINIMUM_BITS */
+STATIC_ASSERT(VM_METHOD_TYPE_MINIMUM_BITS,
+              VM_METHOD_TYPE_REFINED <= (1<<VM_METHOD_TYPE_MINIMUM_BITS));
 
 #ifndef rb_iseq_t
 typedef struct rb_iseq_struct rb_iseq_t;
-- 
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