Hey there!
I come across this weird bug(?) when I was trying to inspect an object in irb. Since irb uses pp to print the objects I'm opening this issue here.
In my case I have a class that inherits from SimpleDelegator:
require "delegate"
class Parent
def inspect
"<parent>"
end
end
class Child < SimpleDelegator
def inspect
"<child>"
end
end
In irb I noticed it because the objects are being shown using inspect:
irb(main):001> Parent.new.inspect
# => "<parent>"
irb(main):002> Parent.new
# => <parent>
irb(main):003> Child.new(Parent.new).inspect
# => "<child>"
irb(main):004> Child.new(Parent.new)
# => <parent>
Personally, I would have expected the last one to also show <child>. Now after digging into this a bit more (thanks @st0012), it seems like you can also reproduce this in pp directly using:
require "delegate"
require "pp"
class Parent
def inspect
"<parent>"
end
end
class Child < SimpleDelegator
def inspect
"<child>"
end
end
parent = Parent.new
child = Child.new(parent)
pp child
#=> "<parent>"