[ruby-cvs:65231] nagachika:r58060 (ruby_2_3): merge revision(s) 57688, 57689: [Backport #13242]

[nagachika at ruby-lang.org]

nagachika	2017-03-22 23:13:40 +0900 (Wed, 22 Mar 2017)

  New Revision: 58060

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=58060

  Log:
    merge revision(s) 57688,57689: [Backport #13242]
    
    rational.c: infinity in power
    
    * rational.c (nurat_expt): return Infinity due to overflow.
      [ruby-core:79686] [Bug #13242]:
    rational.c: infinity in power
    
    * rational.c (nurat_expt): return 0 due to overflow.
      [ruby-core:79686] [Bug #13242]:

  Modified directories:
    branches/ruby_2_3/
  Modified files:
    branches/ruby_2_3/numeric.c
    branches/ruby_2_3/rational.c
    branches/ruby_2_3/test/ruby/test_rational.rb
    branches/ruby_2_3/version.h