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Bug #20716
closedDifferent instance_method behavior in Ruby 2.7 and Ruby 3.x
Description
Hi, I am working on upgrading our project from 2.7 to 3.x and found a breaking change in instance_method
behavior.
Here is the code snippet
module A
def test(*args)
super
end
end
module B
def test(a)
puts a
end
end
B.prepend(A)
a = lambda do
puts 'lambda'
end
class C
include B
end
B.instance_method(:test).bind(C.new).call(1)
# Ruby 2.7: 1
# Ruby 3.0: 1
# Ruby 3.1: 1
B.module_exec do
define_method(:test, a)
end
B.instance_method(:test).bind(C.new).call
# Ruby 2.7: lambda
# Ruby 3.0: wrong number of arguments (given 0, expected 1) (ArgumentError)
# Ruby 3.1: wrong number of arguments (given 0, expected 1) (ArgumentError)
I don't know if this is a bug or a correct intention.
My specs:
- Ruby manager: rbenv
- Tested on
- ruby 2.7.4p191 (2021-07-07 revision a21a3b7d23) [x86_64-linux]
- ruby 3.0.7p220 (2024-04-23 revision 724a071175) [x86_64-linux]
- ruby 3.1.4p223 (2023-03-30 revision 957bb7cb81) [x86_64-linux]
- ruby 3.2.3 (2024-01-18 revision 52bb2ac0a6) [x86_64-linux]
- ruby 3.3.1 (2024-04-23 revision c56cd86388) [x86_64-linux]
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