Bug #1135: Problem renaming CMath.hypot in Ruby1.9

• Status: Closed
• Assignee: ko1 (Koichi Sasada)
• Target version: 1.9.1
• ruby -v: ruby 1.9.1p0 (2009-01-30 revision 21907) [x86_64-linux]

[wedesoft (Jan Wedekind)]

=begin

Running the following program with Ruby1.9 ...

require 'complex'
class Module
def alias_method_chain( target, feature )
alias_method "#{target}without#{feature}", target
alias_method target, "#{target}with#{feature}"
end
end
Math.module_eval do
define_method( :hypot_with_test ) do |a,b|
puts "hypot_with_test( #{a}, #{b} )"
hypot_without_test( a, b )
end
alias_method_chain :hypot, :test
module_function :hypot_without_test
module_function :hypot
end
puts Math.hypot( 3, 4 )

... results in this error:

t.rb:14:in module_function': undefined method hypot_without_test' for module `CMath' (NameError)

from t.rb:14:in `block in '

from t.rb:8:in `module_eval'

from t.rb:8:in `

Using Ruby 1.8.6 the same program runs without error. The problem also does not occur if 'complex' is not loaded.

=end

[tadf (tadayoshi funaba)]

=begin
I wrote an independence version.
It seems to be defference between them evaluaters.

module CMath
include Math
module_function :hypot
end

Object.instance_eval{remove_const :Math}
Math = CMath

class Module
def alias_method_chain( target, feature )
alias_method "#{target}without#{feature}", target
alias_method target, "#{target}with#{feature}"
end
end
Math.module_eval do
define_method( :hypot_with_test ) do |a,b|
puts "hypot_with_test( #{a}, #{b} )"
hypot_without_test( a, b )
end
alias_method_chain :hypot, :test
module_function :hypot_without_test
module_function :hypot
end
puts Math.hypot( 3, 4 )

=end

[yugui (Yuki Sonoda)]

• Assignee set to tadf (tadayoshi funaba)

=begin

=end

[tadf (tadayoshi funaba)]

• Assignee changed from tadf (tadayoshi funaba) to ko1 (Koichi Sasada)

=begin

=end

[wanabe (_ wanabe)]

• Status changed from Open to Closed

=begin
fixed by r26255.
=end