Bug #10698: Time#local behaves differently during clock change

• Status: Closed
• Assignee: nobu (Nobuyoshi Nakada)
• Target version: 2.2.0
• ruby -v: ruby 2.2.0p0 (2014-12-25 revision 49005) [x86_64-darwin14]
• Backport: 2.0.0: DONTNEED, 2.1: DONTNEED, 2.2: DONE

[boris (Boris Ruf)]

This is probably not a bug but since it changes previous behavior it should be noted somewhere.

Ruby 2.1.5:

>> ENV['TZ'] = 'Europe/Berlin'
=> "Europe/Berlin"
>> Time.local(2011,10,30,2,0,0).zone
=> "CET"

Ruby 2.2.0:

>> ENV['TZ'] = 'Europe/Berlin'
=> "Europe/Berlin"
>> Time.local(2011,10,30,2,0,0).zone
=> "CEST"

So in older Ruby versions the object represents the time after the clock change (within the extra hour), while in Ruby 2.2.0 it represents the time before time is set back.

[akr (Akira Tanaka)]

• Status changed from Open to Closed
• % Done changed from 0 to 100

Applied in changeset r49162.

---

• time.c (timelocalw): Set tm_isdst field -1 if vtm->isdst is
  VTM_ISDST_INITVAL. This bug is introduced at packing struct
  vtm (r45155).
  [ruby-core:67345] [Bug #10698] Reported by Boris Ruf.

[nagachika (Tomoyuki Chikanaga)]

• Backport changed from 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN to 2.0.0: DONTNEED, 2.1: DONTNEED, 2.2: REQUIRED

[naruse (Yui NARUSE)]

• Backport changed from 2.0.0: DONTNEED, 2.1: DONTNEED, 2.2: REQUIRED to 2.0.0: DONTNEED, 2.1: DONTNEED, 2.2: DONE

ruby_2_2 r49284 merged revision(s) 49162.