From 1a3b32343ed9ebf287ae5a0f241877728e62bea5 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby-lang.org>
Date: Tue, 27 Jun 2017 22:29:24 +0900
Subject: Copy argv from VM stack to avoid use-after-free; fix #3722

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

(limited to 'src/class.c')

diff --git a/src/class.c b/src/class.c
index 0eea9b4dc..99ad14d81 100644
--- a/src/class.c
+++ b/src/class.c
@@ -902,7 +902,9 @@ mrb_get_args(mrb_state *mrb, const char *format, ...)
         if (argc > i) {
           *pl = argc-i;
           if (*pl > 0) {
-            *var = ARGV + arg_i;
+            mrb_value args = mrb_ary_new_from_values(mrb, *pl, ARGV+arg_i);
+            RARRAY(args)->c = NULL;
+            *var = (mrb_value*)RARRAY_PTR(args);
           }
           i = argc;
           arg_i += *pl;
-- 
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