[ruby-core:67730] [ruby-trunk - Bug #10767] [Open] Time.local doesn't raise an exception during the dead hour on DST

Issue #10767 has been reported by Gabriel Sobrinho.

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Bug #10767: Time.local doesn't raise an exception during the dead hour on DST
https://bugs.ruby-lang.org/issues/10767

* Author: Gabriel Sobrinho
* Status: Open
* Priority: Normal
* Assignee: 
* ruby -v: ruby 2.1.5p273 (2014-11-13 revision 48405) [x86_64-linux-gnu]
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN
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At the begin of DST ruby is accepting the 0 hour which in fact doesn't exists:

    Time.local(2014, 10, 19, 0, 30)
    #=> 2014-10-19 01:30:00 -0200

    Time.local(2014, 10, 19, 1, 30)
    #=> 2014-10-19 01:30:00 -0200

    Time.local(2014, 10, 19, 2, 30)
    #=> 2014-10-19 02:30:00 -0200

In fact it is returning the next hour for some reason, causing a really strange behaviour:

    Time.local(2014, 10, 19, 0, 30) == Time.local(2014, 10, 19, 1, 30)
    #=> true

I think it makes more sense to raise an exception as happens when you specify a invalid month, day, hour, minute or second:

    Time.local(2014, 10, 19, 1, 60) # 60 minutes doesn't exists
    ArgumentError: invalid date

    Time.local(2014, 10, 19, 25, 30) # 25 hours doesn't exists
    ArgumentError: invalid date

Makes sense? I would be happy to provide a patch.



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