From 4b41ee154f117e18b54c7fb31574f2e314f10f15 Mon Sep 17 00:00:00 2001
From: Aaron Patterson <tenderlove@ruby-lang.org>
Date: Thu, 1 Oct 2020 18:13:26 -0700
Subject: Update the thread's self / wrapper address

Threads can move, and if they do, their self pointer may go bad.  We
need to update it.
---
 vm.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'vm.c')

diff --git a/vm.c b/vm.c
index 1b8b5483aa..9535205fb2 100644
--- a/vm.c
+++ b/vm.c
@@ -2660,6 +2660,8 @@ thread_compact(void *ptr)
 {
     rb_thread_t *th = ptr;
 
+    th->self = rb_gc_location(th->self);
+
     if (!th->root_fiber) {
         rb_execution_context_update(th->ec);
     }
-- 
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