1 files changed, 1 insertions, 0 deletions
diff --git a/eval.c b/eval.c
index 69ceb0ef8c..783098c385 100644
--- a/eval.c
+++ b/eval.c
@@ -11166,6 +11166,7 @@ rb_thread_group(thread)
     th->priority = 0;\
     th->thgroup = thgroup_default;\
     th->locals = 0;\
+    th->thread = 0;\
 } while (0)
 
 static rb_thread_t