From 3b0a36d3993ff6c553b171c8bcb0e703a471ef5e Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby-lang.org>
Date: Sat, 22 Apr 2017 12:03:56 +0900
Subject: Alias should `push()` extra stack space for blocks.

---
 mrbgems/mruby-compiler/core/codegen.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/mrbgems/mruby-compiler/core/codegen.c b/mrbgems/mruby-compiler/core/codegen.c
index 4a77fb8fb..e790e6dfc 100644
--- a/mrbgems/mruby-compiler/core/codegen.c
+++ b/mrbgems/mruby-compiler/core/codegen.c
@@ -2583,7 +2583,8 @@ codegen(codegen_scope *s, node *tree, int val)
       genop(s, MKOP_ABx(OP_LOADSYM, cursp(), b));
       push();
       genop(s, MKOP_A(OP_LOADNIL, cursp()));
-      pop_n(3);
+      push();
+      pop_n(4);
       genop(s, MKOP_ABC(OP_SEND, cursp(), c, 2));
       if (val) {
         push();
-- 
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