Bug #1019: irb/xmp fails because StringInputMethod doesn't support #encoding
http://redmine.ruby-lang.org/issues/show/1019

Author: Dave Thomas
Status: Open, Priority: Normal

% ruby -v -r irb/xmp -e 'xmp("1+2")'

ruby 1.9.1p5000 (2009-01-16 trunk 21610) [i386-darwin9.6.0]

/usr/local/rubybook/lib/ruby/1.9.1/irb/context.rb:166: warning: method redefined; discarding old irb_name
1+2
/usr/local/rubybook/lib/ruby/1.9.1/irb/ruby-lex.rb:243:in `block (2 levels) in each_top_level_statement': undefined method `encoding' for #<XMP::StringInputMethod:0x3e1e44> (NoMethodError)
	from /usr/local/rubybook/lib/ruby/1.9.1/irb/ruby-lex.rb:230:in `loop'
	from /usr/local/rubybook/lib/ruby/1.9.1/irb/ruby-lex.rb:230:in `block in each_top_level_statement'
	from /usr/local/rubybook/lib/ruby/1.9.1/irb/ruby-lex.rb:229:in `catch'
	from /usr/local/rubybook/lib/ruby/1.9.1/irb/ruby-lex.rb:229:in `each_top_level_statement'
	from /usr/local/rubybook/lib/ruby/1.9.1/irb.rb:145:in `eval_input'
	from /usr/local/rubybook/lib/ruby/1.9.1/irb/xmp.rb:49:in `block in puts'
	from /usr/local/rubybook/lib/ruby/1.9.1/irb/xmp.rb:48:in `catch'
	from /usr/local/rubybook/lib/ruby/1.9.1/irb/xmp.rb:48:in `puts'
	from /usr/local/rubybook/lib/ruby/1.9.1/irb/xmp.rb:83:in `xmp'
	from -e:1:in `<main>'


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