From 0cb501545cba12fd05ee033eea0c84dbb27e1936 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby-lang.org>
Date: Mon, 10 Apr 2017 09:24:42 +0900
Subject: Fill omitted arguments by nil for non-strict Proc.

---
 src/vm.c | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'src')

diff --git a/src/vm.c b/src/vm.c
index 49f10c5a5..1f34a8c5b 100644
--- a/src/vm.c
+++ b/src/vm.c
@@ -1607,9 +1607,15 @@ RETRY_TRY_BLOCK:
         if (argv0 != argv) {
           value_move(&regs[1], argv, argc-mlen); /* m1 + o */
         }
+        if (argc < m1) {
+          stack_clear(&regs[argc+1], m1-argc);
+        }
         if (mlen) {
           value_move(&regs[len-m2+1], &argv[argc-mlen], mlen);
         }
+        if (mlen < m2) {
+          stack_clear(&regs[len-m2+mlen+1], m2-mlen);
+        }
         if (r) {
           regs[m1+o+1] = mrb_ary_new_capa(mrb, 0);
         }
-- 
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