From 5e26619660f20272a53c7f839dde36cce034bb35 Mon Sep 17 00:00:00 2001
From: Aaron Patterson <tenderlove@ruby-lang.org>
Date: Thu, 14 Jan 2021 09:55:54 -0800
Subject: Fix WB for callinfo

The WB for callinfo needs to be executed *after* the reference is
written.  Otherwise we get a WB miss.
---
 compile.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/compile.c b/compile.c
index 388d476c68..916efb505e 100644
--- a/compile.c
+++ b/compile.c
@@ -1309,6 +1309,7 @@ new_insn_send(rb_iseq_t *iseq, int line_no, ID id, VALUE argc, const rb_iseq_t *
         RB_OBJ_WRITTEN(iseq, Qundef, blockiseq);
     }
     INSN *insn = new_insn_core(iseq, line_no, BIN(send), 2, operands);
+    RB_OBJ_WRITTEN(iseq, Qundef, ci);
     RB_GC_GUARD(ci);
     return insn;
 }
-- 
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