From 64712906b063d5470f74ef0b19d16e4aa84defdf Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Fri, 3 Aug 2018 06:31:22 +0000
Subject: random.c: endless range random

* random.c (range_values): cannot determine the domain of an endless
  range.  [ruby-core:88261] [Bug #14958]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64167 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 random.c               | 3 ++-
 test/ruby/test_rand.rb | 1 +
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/random.c b/random.c
index 7165f3c4a3..75ad5ff5bd 100644
--- a/random.c
+++ b/random.c
@@ -302,6 +302,7 @@ VALUE rb_cRandom;
 #define id_minus '-'
 #define id_plus  '+'
 static ID id_rand, id_bytes;
+NORETURN(static void domain_error(void));
 
 /* :nodoc: */
 static void
@@ -1163,6 +1164,7 @@ range_values(VALUE vmax, VALUE *begp, VALUE *endp, int *exclp)
 
     if (!rb_range_values(vmax, begp, &end, exclp)) return Qfalse;
     if (endp) *endp = end;
+    if (NIL_P(end)) domain_error();
     if (!rb_respond_to(end, id_minus)) return Qfalse;
     r = rb_funcallv(end, id_minus, 1, begp);
     if (NIL_P(r)) return Qfalse;
@@ -1205,7 +1207,6 @@ rand_int(VALUE obj, rb_random_t *rnd, VALUE vmax, int restrictive)
     }
 }
 
-NORETURN(static void domain_error(void));
 static void
 domain_error(void)
 {
diff --git a/test/ruby/test_rand.rb b/test/ruby/test_rand.rb
index 136ee4f912..ab9a1837f6 100644
--- a/test/ruby/test_rand.rb
+++ b/test/ruby/test_rand.rb
@@ -399,6 +399,7 @@ END
 
     assert_raise(Errno::EDOM, Errno::ERANGE) { r.rand(1.0 / 0.0) }
     assert_raise(Errno::EDOM, Errno::ERANGE) { r.rand(0.0 / 0.0) }
+    assert_raise(Errno::EDOM) {r.rand(1..)}
 
     r = Random.new(0)
     assert_in_delta(1.5488135039273248, r.rand(1.0...2.0), 0.0001, '[ruby-core:24655]')
-- 
cgit v1.2.3