From 2a4db1a4beddf5657a458faeaac2bb970a374eed Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby-lang.org>
Date: Wed, 12 Apr 2017 10:28:57 +0900
Subject: `method_missing` might have updated stack beyond boundary; fix #3599

---
 src/vm.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/vm.c b/src/vm.c
index 3466e89db..05ab15e1c 100644
--- a/src/vm.c
+++ b/src/vm.c
@@ -395,6 +395,7 @@ mrb_funcall_with_block(mrb_state *mrb, mrb_value self, mrb_sym mid, mrb_int argc
         mrb_method_missing(mrb, mid, self, args);
       }
       mrb_ary_unshift(mrb, args, mrb_symbol_value(mid));
+      stack_extend(mrb, n+2);
       mrb->c->stack[n+1] = args;
       argc = -1;
     }
-- 
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