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Bug #13264

Binding#irb does not work in context of frozen object

Added by rbjl (Jan Lelis) about 2 years ago. Updated almost 2 years ago.

Status:
Assigned
Priority:
Normal
Target version:
-
ruby -v:
ruby 2.4.0p0 (2016-12-24 revision 57164) [x86_64-linux]
[ruby-core:79843]

Description

This works as expected (starts IRB):

$ ruby -r irb -e '"".instance_eval{ binding.irb }'

This throws an error:

$ ruby -r irb -e '"".freeze.instance_eval{ binding.irb }'
/home/jan/.rvm/rubies/ruby-2.4.0/lib/ruby/2.4.0/irb/extend-command.rb:199:in `extend_object': can't define singleton (TypeError)
    from /home/jan/.rvm/rubies/ruby-2.4.0/lib/ruby/2.4.0/irb.rb:413:in `extend'
    from /home/jan/.rvm/rubies/ruby-2.4.0/lib/ruby/2.4.0/irb.rb:413:in `initialize'
    from /home/jan/.rvm/rubies/ruby-2.4.0/lib/ruby/2.4.0/irb.rb:713:in `new'
    from /home/jan/.rvm/rubies/ruby-2.4.0/lib/ruby/2.4.0/irb.rb:713:in `irb'
    from -e:1:in `block in <main>'
    from -e:1:in `instance_eval'
    from -e:1:in `<main>'

Also fails, but slightly different error:

ruby -r irb -e 'Object.new.freeze.instance_eval{ binding.irb }'
/home/jan/.rvm/rubies/ruby-2.4.0/lib/ruby/2.4.0/irb/extend-command.rb:200:in `extend_object': can't modify frozen object (RuntimeError)
    from /home/jan/.rvm/rubies/ruby-2.4.0/lib/ruby/2.4.0/irb/extend-command.rb:200:in `extend_object'
    from /home/jan/.rvm/rubies/ruby-2.4.0/lib/ruby/2.4.0/irb.rb:413:in `extend'
    from /home/jan/.rvm/rubies/ruby-2.4.0/lib/ruby/2.4.0/irb.rb:413:in `initialize'
    from /home/jan/.rvm/rubies/ruby-2.4.0/lib/ruby/2.4.0/irb.rb:713:in `new'
    from /home/jan/.rvm/rubies/ruby-2.4.0/lib/ruby/2.4.0/irb.rb:713:in `irb'
    from -e:1:in `block in <main>'
    from -e:1:in `instance_eval'
    from -e:1:in `<main>'

History

Updated by shyouhei (Shyouhei Urabe) almost 2 years ago

  • Assignee set to nobu (Nobuyoshi Nakada)
  • Status changed from Open to Assigned

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