Issue #1720 has been updated by Hanmac (Hans Mackowiak).


@Eregon

checkout the object id `Float::NAN.object_id != (0.0/0).object_id`
while `NAN` is a constant, `(0.0/0)` returns a new object each time

thats why your Array compare shows a difference

----------------------------------------
Bug #1720: [NaN] == [NaN] が true になる
https://bugs.ruby-lang.org/issues/1720#change-67659

* Author: tadf (tadayoshi funaba)
* Status: Closed
* Priority: Normal
* Assignee: mrkn (Kenta Murata)
* Target version: 2.0.0
* ruby -v: ruby 1.9.2dev (2009-07-03 trunk 23945) [i686-linux]
* Backport: 2.3: UNKNOWN, 2.4: UNKNOWN
----------------------------------------
=begin
 NaN = 0.0/0
 [NaN] == [NaN] が true になりますが、
 
 NaN == NaN #=> false
 [1] == [1.0] #=> true
 
 という結果からするとおかしいように思います。
=end




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