rand(beginless_range) raise Errno::EDOM instead of TypeError

same as `rand(endless_range)`

Before:
```
$ ruby -e 'rand(..1)'
Traceback (most recent call last):
	2: from -e:1:in `<main>'
	1: from -e:1:in `rand'
-e:1:in `-': nil can't be coerced into Integer (TypeError)
```

After:
```
$ ruby -e 'rand(..1)'
Traceback (most recent call last):
	1: from -e:1:in `<main>'
-e:1:in `rand': Numerical argument out of domain (Errno::EDOM)
```

1 files changed, 1 insertions, 0 deletions

diff --git a/test/ruby/test_rand.rb b/test/ruby/test_rand.rb
index ab9a1837f6..939d17bdf7 100644
--- a/test/ruby/test_rand.rb
+++ b/test/ruby/test_rand.rb
@@ -400,6 +400,7 @@ 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..)}
+    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]')