mame	2017-09-12 22:57:36 +0900 (Tue, 12 Sep 2017)

  New Revision: 59858

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=59858

  Log:
    Random.urandom raises an exception instead of returning nil when failed
    
    Early failure looks better in this case.  Refs [Bugs #13885].

  Modified files:
    trunk/random.c
Index: random.c
===================================================================
--- random.c	(revision 59857)
+++ random.c	(revision 59858)
@@ -624,7 +624,8 @@ random_raw_seed(VALUE self, VALUE size) https://github.com/ruby/ruby/blob/trunk/random.c#L624
     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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