Feature #2018: [irb] BasicObject.new doesn't have an inspect

• Status: Closed
• Assignee: keiju (Keiju Ishitsuka)
• Target version: 2.0.0

[DanielBovensiepen (Daniel Bovensiepen)]

=begin
Using BasicObject.new in irb:

daniel@boviAir# ruby19 --version
ruby 1.9.2dev (2009-08-30 trunk 24718) [i386-darwin9.8.0]
daniel@boviAir# irb19 --version
irb 0.9.6(09/06/30)
daniel@boviAir# irb19
irb(main):001:0> BasicObject.new

Produce an Exception due to the fact that inspect doesn't exist in the BasicObject:

NoMethodError: undefined method inspect' for #<BasicObject:0x4b2738> from /Users/danielbovensiepen/Programs/ruby19/lib/ruby/1.9.1/irb/inspector.rb:84:in block in module:IRB'
from /Users/danielbovensiepen/Programs/ruby19/lib/ruby/1.9.1/irb/inspector.rb:30:in call' from /Users/danielbovensiepen/Programs/ruby19/lib/ruby/1.9.1/irb/inspector.rb:30:in inspect_value'
from /Users/danielbovensiepen/Programs/ruby19/lib/ruby/1.9.1/irb/context.rb:259:in inspect_last_value' from /Users/danielbovensiepen/Programs/ruby19/lib/ruby/1.9.1/irb.rb:309:in output_value'
from /Users/danielbovensiepen/Programs/ruby19/lib/ruby/1.9.1/irb.rb:158:in block (2 levels) in eval_input' from /Users/danielbovensiepen/Programs/ruby19/lib/ruby/1.9.1/irb.rb:271:in signal_status'
from /Users/danielbovensiepen/Programs/ruby19/lib/ruby/1.9.1/irb.rb:154:in block in eval_input' from /Users/danielbovensiepen/Programs/ruby19/lib/ruby/1.9.1/irb/ruby-lex.rb:244:in block (2 levels) in each_top_level_statement'
from /Users/danielbovensiepen/Programs/ruby19/lib/ruby/1.9.1/irb/ruby-lex.rb:230:in loop' from /Users/danielbovensiepen/Programs/ruby19/lib/ruby/1.9.1/irb/ruby-lex.rb:230:in block in each_top_level_statement'
from /Users/danielbovensiepen/Programs/ruby19/lib/ruby/1.9.1/irb/ruby-lex.rb:229:in catch' from /Users/danielbovensiepen/Programs/ruby19/lib/ruby/1.9.1/irb/ruby-lex.rb:229:in each_top_level_statement'
from /Users/danielbovensiepen/Programs/ruby19/lib/ruby/1.9.1/irb.rb:153:in eval_input' from /Users/danielbovensiepen/Programs/ruby19/lib/ruby/1.9.1/irb.rb:70:in block in start'
from /Users/danielbovensiepen/Programs/ruby19/lib/ruby/1.9.1/irb.rb:69:in catch' from /Users/danielbovensiepen/Programs/ruby19/lib/ruby/1.9.1/irb.rb:69:in start'
from /Users/danielbovensiepen/Programs/ruby19/bin/irb19:12:in `'Maybe IRB bug!!

In the attachment is a patch for catching this exception.
=end

[dblack (David Black)]

=begin
Hi --

On Mon, 31 Aug 2009, Daniel Bovensiepen wrote:

Bug #2018: [irb] BasicObject.new doesn't have an inspect
http://redmine.ruby-lang.org/issues/show/2018

Why is that a bug?

David

--
David A. Black / Ruby Power and Light, LLC / http://www.rubypal.com
Ruby/Rails training, mentoring, consulting, code-review
Latest book: The Well-Grounded Rubyist (http://www.manning.com/black2)

September Ruby training in NJ has been POSTPONED. Details to follow.

=end

[hongli (Hongli Lai)]

=begin
I thought the whole point of BasicObject is that it doesn't have any methods.
=end

[matz (Yukihiro Matsumoto)]

=begin
Hi,

In message "Re: [ruby-core:25201] Re: [Bug #2018] [irb] BasicObject.new doesn't have an inspect"
on Mon, 31 Aug 2009 02:49:19 +0900, "David A. Black" [e-mail] writes:

|> Bug #2018: [irb] BasicObject.new doesn't have an inspect
|> http://redmine.ruby-lang.org/issues/show/2018
|
|Why is that a bug?

I think it's not the point. BasicObject has no method (with a few
exception) by its definition. But irb should handle objects without
inspect defined.

						matz.

=end

[dblack (David Black)]

=begin
On Mon, 31 Aug 2009, Yukihiro Matsumoto wrote:

Hi,

In message "Re: [ruby-core:25201] Re: [Bug #2018] [irb] BasicObject.new doesn't have an inspect"
on Mon, 31 Aug 2009 02:49:19 +0900, "David A. Black" [e-mail] writes:

|> Bug #2018: [irb] BasicObject.new doesn't have an inspect
|> http://redmine.ruby-lang.org/issues/show/2018
|
|Why is that a bug?

I think it's not the point. BasicObject has no method (with a few
exception) by its definition. But irb should handle objects without
inspect defined.

Ah, OK -- I didn't catch onto that.

Actually I really like doing:

>> b = BasicObject.new

in irb when I'm teaching 1.9 -- very dramatic way to demonstrate the
basicness of BasicObject :-) But I can understand that it should
probably be handled more gracefully.

David

--
David A. Black / Ruby Power and Light, LLC / http://www.rubypal.com
Ruby/Rails training, mentoring, consulting, code-review
Latest book: The Well-Grounded Rubyist (http://www.manning.com/black2)

September Ruby training in NJ has been POSTPONED. Details to follow.

=end

[yugui (Yuki Sonoda)]

• Assignee set to keiju (Keiju Ishitsuka)
• Target version set to 2.0.0

=begin
It is not a bug. But I think enhancement for irb is possible.
What kind of handling do you want?
=end

[matz (Yukihiro Matsumoto)]

• Status changed from Open to Closed
• % Done changed from 0 to 100

=begin
Applied in changeset r24779.
=end