From: Brian Candler <redmine@...>
Date: 2009-07-31T02:23:54+09:00
Subject: [ruby-core:24621] [Bug #1843] Symbol#inspect raises exception

Bug #1843: Symbol#inspect raises exception
http://redmine.ruby-lang.org/issues/show/1843

Author: Brian Candler
Status: Open, Priority: Normal
ruby -v: ruby 1.9.2dev (2009-07-18 trunk 24186) [i686-linux]

If you can create an object, I think you should always be able to inspect it.

However Symbol#inspect raises an exception if it was made from a string with an invalid encoding.

>> "hello\xff".to_sym.inspect
ArgumentError: invalid byte sequence in UTF-8
	from (irb):26:in `inspect'
	from (irb):26
	from /usr/local/bin/irb19:12:in `<main>'

Note that the to_sym is quite happy; it's the inspect which fails.

>> "hello\xff".to_sym; nil
=> nil

This means you cannot handle such objects in irb.

>> s = :"hello\xff"
ArgumentError: invalid byte sequence in UTF-8
	from /usr/local/lib/ruby/1.9.1/irb/inspector.rb:84:in `inspect'
	from /usr/local/lib/ruby/1.9.1/irb/inspector.rb:84:in `block in <module:IRB>'
	from /usr/local/lib/ruby/1.9.1/irb/inspector.rb:30:in `call'
	from /usr/local/lib/ruby/1.9.1/irb/inspector.rb:30:in `inspect_value'
	from /usr/local/lib/ruby/1.9.1/irb/context.rb:259:in `inspect_last_value'
	from /usr/local/lib/ruby/1.9.1/irb.rb:301:in `output_value'
	from /usr/local/lib/ruby/1.9.1/irb.rb:150:in `block (2 levels) in eval_input'
	from /usr/local/lib/ruby/1.9.1/irb.rb:263:in `signal_status'
	from /usr/local/lib/ruby/1.9.1/irb.rb:146:in `block in eval_input'
	from /usr/local/lib/ruby/1.9.1/irb/ruby-lex.rb:244:in `block (2 levels) in each_top_level_statement'
	from /usr/local/lib/ruby/1.9.1/irb/ruby-lex.rb:230:in `loop'
	from /usr/local/lib/ruby/1.9.1/irb/ruby-lex.rb:230:in `block in each_top_level_statement'
	from /usr/local/lib/ruby/1.9.1/irb/ruby-lex.rb:229:in `catch'
	from /usr/local/lib/ruby/1.9.1/irb/ruby-lex.rb:229:in `each_top_level_statement'
	from /usr/local/lib/ruby/1.9.1/irb.rb:145:in `eval_input'
	from /usr/local/lib/ruby/1.9.1/irb.rb:69:in `block in start'
	from /usr/local/lib/ruby/1.9.1/irb.rb:68:in `catch'
	from /usr/local/lib/ruby/1.9.1/irb.rb:68:in `start'
	from /usr/local/bin/irb19:12:in `<main>'Maybe IRB bug!!
>>


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