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Bug #13145
closedSymbol#clone doesn't work correctly
Status:
Closed
Assignee:
-
Target version:
-
ruby -v:
ruby 2.4.0p0 (2016-12-24 revision 57164) [x86_64-darwin16]
Description
Ruby 2.4.0 has a bug that Symbol
converted from String
at first cannot be cloned:
user@mypc ~$ irb
irb(main):001:0> :abc.clone # When :abc has not been created from String (e.g. 'abc'.to_s.to_sym), clone will work.
=> :abc
irb(main):002:0> 'abc'.to_s.to_sym
=> :abc
irb(main):003:0> :abc.clone # This clone will also work.
=> :abc
irb(main):004:0> 'abcd'.to_s.to_sym
=> :abcd
irb(main):005:0> :abcd.clone # This clone WON'T WORK!?
TypeError: allocator undefined for Symbol
from (irb):5:in `clone'
from (irb):5
from /usr/local/bin/irb:11:in `<main>'
irb(main):006:0>
As written in Ruby 2.4.0 documentation (e.g. https://docs.ruby-lang.org/ja/latest/method/Object/i/clone.html),
Symbol#clone must return itself.
Currently, I define Symbol#clone as the following in order to fix this bug:
class Symbol
def clone
self
end
end
I think something has gone wrong ...
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