merge revision(s) 39594,39596: [Backport #8010]
* enumerator.c (enumerator_with_index_i): allow Bignum as offset, to get rid of conversion exception and integer overflow. [ruby-dev:47131] [Bug #8010] * enumerator.c (enumerator_with_index): Restore handling of a nil memo from r39594.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@43960 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 39594,39596: [Backport #8010]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@43960 b2dd03c8-39d4-4d8f-98ff-823fe69b080e