https://git.ruby-lang.org/ruby.git/commit/?id=b8247a1669

From b8247a16694242a6e6bdd53d09a9443753a4e979 Mon Sep 17 00:00:00 2001
From: John Hawthorn <john@h...>
Date: Wed, 13 Jul 2022 00:16:46 -0700
Subject: Correct comment explaining env flags [ci skip]

We use 4 values for env flags now, which also shifted over the frame
flags by one bit.
---
 vm_core.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/vm_core.h b/vm_core.h
index b7d980e0ec..f8eea13750 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -1232,10 +1232,10 @@ typedef rb_control_frame_t * https://github.com/ruby/ruby/blob/trunk/vm_core.h#L1232
 
 enum vm_frame_env_flags {
     /* Frame/Environment flag bits:
-     *   MMMM MMMM MMMM MMMM ____ _FFF FFFF EEEX (LSB)
+     *   MMMM MMMM MMMM MMMM ____ FFFF FFFE EEEX (LSB)
      *
      * X   : tag for GC marking (It seems as Fixnum)
-     * EEE : 3 bits Env flags
+     * EEE : 4 bits Env flags
      * FF..: 7 bits Frame flags
      * MM..: 15 bits frame magic (to check frame corruption)
      */
-- 
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