From 7cc55f4bc4d836e8edcae05f1b500417fc2b71a3 Mon Sep 17 00:00:00 2001
From: Kazuhiro NISHIYAMA <zn@mbf.nifty.com>
Date: Tue, 12 May 2020 11:46:41 +0900
Subject: [PATCH] Thread#backtrace may return nil [ci skip]

---
 thread.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/thread.c b/thread.c
index cb2bd8930a..7ecc535b88 100644
--- a/thread.c
+++ b/thread.c
@@ -5128,7 +5128,7 @@ rb_exec_recursive_paired_outer(VALUE (*func) (VALUE, VALUE, int), VALUE obj, VAL
 
 /*
  *  call-seq:
- *     thread.backtrace    -> array
+ *     thread.backtrace    -> array or nil
  *
  *  Returns the current backtrace of the target thread.
  *