Let the adapter handle invalid UTF8

Author: rwz

lib/multi_json/adapter.rb

@@ -48,6 +48,8 @@ def cache(method, options)
 
       def blank?(input)
         input.nil? || /\A\s*\z/ === input
+      rescue ArgumentError # invalid byte sequence in UTF-8
+        false
       end
 
     end

lib/multi_json/adapters/ok_json.rb

@@ -12,6 +12,8 @@ def load(string, options={})
         string = string.read if string.respond_to?(:read)
         result = ::MultiJson::OkJson.decode("[#{string}]").first
         options[:symbolize_keys] ? symbolize_keys(result) : result
+      rescue ArgumentError # invalid byte sequence in UTF-8
+        raise ParseError
       end
 
       def dump(object, options={})

spec/shared/adapter.rb

@@ -166,7 +166,7 @@ def to_json(*)
     end
 
     it 'raises MultiJson::LoadError on blank input or invalid input' do
-      [nil, '{"abc"}', ' ', "\t\t\t", "\n"].each do |input|
+      [nil, '{"abc"}', ' ', "\t\t\t", "\n", "\x82\xAC\xEF"].each do |input|
         expect{MultiJson.load(input)}.to raise_error(MultiJson::LoadError)
       end
     end