From 44b4f69fcee7183cb8c762487ab91b01c70bcf50 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Thu, 21 Dec 2017 14:56:11 +0900
Subject: May need more stack space in `mrb_funcall_with_block`; fix #3908

---
 src/vm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/vm.c b/src/vm.c
index 5c6b53c2f..99eb36183 100644
--- a/src/vm.c
+++ b/src/vm.c
@@ -455,7 +455,7 @@ mrb_funcall_with_block(mrb_state *mrb, mrb_value self, mrb_sym mid, mrb_int argc
     }
     else if (argc >= CALL_MAXARGS) {
       mrb_value args = mrb_ary_new_from_values(mrb, argc, argv);
-      stack_extend(mrb, ci->nregs);
+      stack_extend(mrb, ci->nregs+2);
       mrb->c->stack[1] = args;
       ci->argc = -1;
       argc = 1;
-- 
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