From d212f11a004fb60534fc49374a1d5e159a14d710 Mon Sep 17 00:00:00 2001
From: mame <mame@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Tue, 12 Sep 2017 13:57:36 +0000
Subject: Random.urandom raises an exception instead of returning nil when
 failed

Early failure looks better in this case.  Refs [Bugs #13885].

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59858 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 random.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/random.c b/random.c
index 82a51ccb6d..8ea3d77f22 100644
--- a/random.c
+++ b/random.c
@@ -624,7 +624,8 @@ random_raw_seed(VALUE self, VALUE size)
     long n = NUM2ULONG(size);
     VALUE buf = rb_str_new(0, n);
     if (n == 0) return buf;
-    if (fill_random_bytes(RSTRING_PTR(buf), n, FALSE)) return Qnil;
+    if (fill_random_bytes(RSTRING_PTR(buf), n, FALSE))
+	rb_raise(rb_eRuntimeError, "failed to get urandom");
     return buf;
 }
 
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