[ruby-cvs:78685] e2b192f7d5 (master): rand(beginless_range) raise Errno::EDOM instead of TypeError

Kazuhiro NISHIYAMA	2019-12-15 14:47:36 +0900 (Sun, 15 Dec 2019)

  New Revision: e2b192f7d5

  https://github.com/ruby/ruby/commit/e2b192f7d5

  Log:
    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)
    ```

  Modified files:
    random.c
    test/ruby/test_rand.rb