1.9.3-p385 :007 > "\xE6".encoding
=> #<Encoding:UTF-8>
1.9.3-p385 :008 > "\xE6".valid_encoding?
=> false
1.9.3-p385 :009 > "\xE6".encode!('UTF-8', 'BINARY', :invalid => :replace, :undef => :replace).valid_encoding?
=> true
1.9.3-p385 :013 > "\xE6".encode!('UTF-8', 'BINARY', :invalid => :replace, :undef => :replace).match(/\S/)
=> #<MatchData "�">
jruby-1.7.13 :016 > "\xE6".encoding
=> #<Encoding:UTF-8>
jruby-1.7.13 :017 > "\xE6".valid_encoding?
=> false
jruby-1.7.13 :018 > "\xE6".encode!('UTF-8', 'BINARY', :invalid => :replace, :undef => :replace).valid_encoding?
=> false
jruby-1.7.13 :042 > "\xE6".encode!('UTF-8', 'BINARY', :invalid => :replace, :undef => :replace).match(/\S/)
ArgumentError: invalid byte sequence in UTF-8
from org/jruby/RubyRegexp.java:1697:in `match'
from org/jruby/RubyString.java:1734:in `match'
from (irb):42:in `evaluate'
from org/jruby/RubyKernel.java:1101:in `eval'
from org/jruby/RubyKernel.java:1501:in `loop'
from org/jruby/RubyKernel.java:1264:in `catch'
from org/jruby/RubyKernel.java:1264:in `catch'
from /Users/Shared/lenny/.rvm/rubies/jruby-1.7.13/bin/jirb:13:in `(root)'
jruby-1.7.13 :043 >
encode as opposed to #encode! works as expected
jruby-1.7.13 :044 > "\xE6".encode('UTF-8', 'BINARY', :invalid => :replace, :undef => :replace).valid_encoding?
=> true
jruby-1.7.13 :045 > "\xE6".encode('UTF-8', 'BINARY', :invalid => :replace, :undef => :replace).match(/\S/)
=> #<MatchData "�">
