Bug #19292: Time object's wday, yday, and isdst returns broken value (and so does to_a) when kwarg in: 'UTC' was given

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: ruby 3.3.0dev (2022-12-30T15:31:50Z master 0bb07e5ba4) +YJIT [arm64-darwin21]
• Backport: 2.7: REQUIRED, 3.0: REQUIRED, 3.1: DONE, 3.2: DONE

[matsuda (Akira Matsuda)]

$ ruby -e "p Time.new(2023, 1, 1, 0, 0, 0, in: 'UTC').wday"
7

$ ruby -e "p Time.new(2023, 1, 1, 0, 0, 0, in: 'UTC').yday"
0

$ ruby -e "p Time.new(2023, 1, 1, 0, 0, 0, in: 'UTC').isdst"
-e:1:in isdst': isdst is not set yet (RuntimeError) from -e:1:in '

$ ruby -e "p Time.new(2023, 1, 1, 0, 0, 0, in: 'UTC').to_a"
[0, 0, 0, 1, 1, 2023, 7, 0, true, "UTC"]

where the expected to_a value should be:
[0, 0, 0, 1, 1, 2023, 0, 1, false, "UTC"]

This bug seems to be happening on the following conditions:

• On any given date and time, regardless of past or future
• Either on Time.new(Integer, Integer, ...) style or Time.new(String) style
• Only when in: 'UTC' kwarg was given. Other formats like in: '+0000' or in: 0 seems to be OK
• On all Ruby versions that accept kwarg in: (3.1, 3.2, and 3.3)

[nobu (Nobuyoshi Nakada)]

• Backport changed from 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN to 2.7: DONTNEED, 3.0: DONTNEED, 3.1: UNKNOWN, 3.2: REQUIRED

[nobu (Nobuyoshi Nakada)]

https://github.com/ruby/ruby/pull/7051

[nobu (Nobuyoshi Nakada)]

• Backport changed from 2.7: DONTNEED, 3.0: DONTNEED, 3.1: UNKNOWN, 3.2: REQUIRED to 2.7: DONTNEED, 3.0: DONTNEED, 3.1: REQUIRED, 3.2: REQUIRED

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Closed

Applied in changeset git|542e984d82fa25098eb15398d716d907acc52b93.

---

[Bug #19292] Re-initialize tm when wday or yday is not set

[matsuda (Akira Matsuda)]

Confirmed the fix. Thank you, @nobu (Nobuyoshi Nakada)!

[nobu (Nobuyoshi Nakada)]

• Has duplicate Bug #19295: Time#wday returns 7 added

[nobu (Nobuyoshi Nakada)]

• Backport changed from 2.7: DONTNEED, 3.0: DONTNEED, 3.1: REQUIRED, 3.2: REQUIRED to 2.7: REQUIRED, 3.0: REQUIRED, 3.1: REQUIRED, 3.2: REQUIRED

[naruse (Yui NARUSE)]

• Backport changed from 2.7: REQUIRED, 3.0: REQUIRED, 3.1: REQUIRED, 3.2: REQUIRED to 2.7: REQUIRED, 3.0: REQUIRED, 3.1: REQUIRED, 3.2: DONE

ruby_3_2 89cd61890fe78e0491708f87a5df678b03fda8a3 merged revision(s) 542e984d82fa25098eb15398d716d907acc52b93.

[nagachika (Tomoyuki Chikanaga)]

• Backport changed from 2.7: REQUIRED, 3.0: REQUIRED, 3.1: REQUIRED, 3.2: DONE to 2.7: REQUIRED, 3.0: REQUIRED, 3.1: DONE, 3.2: DONE

ruby_3_1 3efc43aace4e051f618b10e82bd82e93076dc757 merged revision(s) 542e984d82fa25098eb15398d716d907acc52b93.