From a66d86cfc15771bd62a045572970c567f7e78637 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Sat, 29 Aug 2020 18:42:09 +0900
Subject: Fix `mrb_ary_splat` to copy the array; fix #5067

---
 src/array.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'src/array.c')

diff --git a/src/array.c b/src/array.c
index ef8588d31..020b661b4 100644
--- a/src/array.c
+++ b/src/array.c
@@ -1081,7 +1081,9 @@ mrb_ary_splat(mrb_state *mrb, mrb_value v)
   mrb_value a;
 
   if (mrb_array_p(v)) {
-    return v;
+    struct RArray *a = mrb_ary_ptr(v);
+    a = ary_dup(mrb, a);
+    return mrb_obj_value(a);
   }
 
   if (!mrb_respond_to(mrb, v, mrb_intern_lit(mrb, "to_a"))) {
-- 
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