Merge branch 'no-implicit-conversion' into mruby2-draftmruby2-draft

1 files changed, 4 insertions, 8 deletions

diff --git a/mrbgems/mruby-enumerator/mrblib/enumerator.rb b/mrbgems/mruby-enumerator/mrblib/enumerator.rb
index 7ca1d5eb6..ae692dd12 100644
--- a/mrbgems/mruby-enumerator/mrblib/enumerator.rb
+++ b/mrbgems/mruby-enumerator/mrblib/enumerator.rb
@@ -157,12 +157,10 @@ class Enumerator
   def with_index(offset=0, &block)
     return to_enum :with_index, offset unless block
 
-    offset = if offset.nil?
-      0
-    elsif offset.respond_to?(:to_int)
-      offset.to_int
+    if offset.nil?
+      offset = 0
     else
-      raise TypeError, "no implicit conversion of #{offset.class} into Integer"
+      offset = offset.__to_int
     end
 
     n = offset - 1
@@ -623,9 +621,7 @@ module Enumerable
   # use Enumerator to use infinite sequence
   def zip(*args, &block)
     args = args.map do |a|
-      if a.respond_to?(:to_ary)
-        a.to_ary.to_enum(:each)
-      elsif a.respond_to?(:each)
+      if a.respond_to?(:each)
         a.to_enum(:each)
       else
         raise TypeError, "wrong argument type #{a.class} (must respond to :each)"