From 6b1d2de6cc2e85fda7885fe77dbd7c99c4eb1ef2 Mon Sep 17 00:00:00 2001
From: Takashi Kokubun <takashikkbn@gmail.com>
Date: Thu, 10 Dec 2020 14:40:22 -0800
Subject: [PATCH] Unfortunately getinstancevariable was still not leaf

https://github.com/ruby/ruby/runs/1533401436
---
 insns.def | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/insns.def b/insns.def
index 2bdb2d5d7a..f912b51c87 100644
--- a/insns.def
+++ b/insns.def
@@ -210,6 +210,8 @@ getinstancevariable
 (ID id, IVC ic)
 ()
 (VALUE val)
+/* Ractor crashes when it accesses class/module-level instances variables. */
+// attr bool leaf = false; /* has IVAR_ACCESSOR_SHOULD_BE_MAIN_RACTOR() */
 {
     val = vm_getinstancevariable(GET_ISEQ(), GET_SELF(), id, ic);
 }