1 files changed, 0 insertions, 1 deletions
diff --git a/vm.c b/vm.c
index 2ab2b92fcc..665351be0a 100644
--- a/vm.c
+++ b/vm.c
@@ -1735,7 +1735,6 @@ rb_thread_mark(void *ptr)
 	RUBY_MARK_UNLESS_NULL(th->first_proc);
 	if (th->first_proc) RUBY_MARK_UNLESS_NULL(th->first_args);
 
-	RUBY_MARK_UNLESS_NULL(th->self);
 	RUBY_MARK_UNLESS_NULL(th->thgroup);
 	RUBY_MARK_UNLESS_NULL(th->value);
 	RUBY_MARK_UNLESS_NULL(th->errinfo);