From: nobu@ruby-lang.org
To: ruby-dev@ruby-lang.org
Subject: [ruby-dev:50653] [Ruby trunk Bug#15177] 起動した後にTZを変更するとTime#utcがずれることがある
Date: Tue, 09 Oct 2018 13:04:45 +0000 (UTC) [thread overview]
Message-ID: <redmine.journal-74360.20181009130444.d75a739f8d0d54dd@ruby-lang.org> (raw)
In-Reply-To: redmine.issue-15177.20180929111256@ruby-lang.org
Issue #15177 has been updated by nobu (Nobuyoshi Nakada).
なぜかminirubyだと一致するようです。
```
$ TZ=Asia/Tokyo ./bin/ruby -ve "ENV['TZ']='right/Asia/Tokyo';t=Time.at(2<<30);p t;p t.utc"
ruby 2.5.2p91 (2018-10-01 revision 64893) [x86_64-linux]
2038-01-19 12:13:41 +0900
2038-01-19 03:14:08 UTC
```
```
$ TZ=Asia/Tokyo ./miniruby -ve "ENV['TZ']='right/Asia/Tokyo';t=Time.at(2<<30);p t;p t.utc"
ruby 2.5.2p91 (2018-10-01 revision 64893) [x86_64-linux]
2038-01-19 12:13:41 +0900
2038-01-19 03:13:41 UTC
```
----------------------------------------
Bug #15177: 起動した後にTZを変更するとTime#utcがずれることがある
https://bugs.ruby-lang.org/issues/15177#change-74360
* Author: znz (Kazuhiro NISHIYAMA)
* Status: Open
* Priority: Normal
* Assignee:
* Target version:
* ruby -v: ruby 2.5.1p57 (2018-03-29 revision 63029) [x86_64-linux]
* Backport: 2.3: UNKNOWN, 2.4: UNKNOWN, 2.5: UNKNOWN
----------------------------------------
起動時に `TZ` を `right/Asia/Tokyo` にしていると `Time#utc` でローカルタイムと同じ時分秒になりますが、 `TZ=Asia/Tokyo` で起動してから `ENV['TZ']='right/Asia/Tokyo'` で変更すると `Time#utc` の結果がうるう秒のぶんだけずれます。
```
$ TZ=Asia/Tokyo ruby -ve "ENV['TZ']='right/Asia/Tokyo';t=Time.at(2<<30);p t;p t.utc"
ruby 2.5.1p57 (2018-03-29 revision 63029) [x86_64-linux]
2038-01-19 12:13:41 +0900
2038-01-19 03:14:08 UTC
$ TZ=right/Asia/Tokyo ruby -ve "t=Time.at(2<<30);p t;p t.utc"
ruby 2.5.1p57 (2018-03-29 revision 63029) [x86_64-linux]
2038-01-19 12:13:41 +0900
2038-01-19 03:13:41 UTC
% TZ=Asia/Tokyo ruby -ve "t=Time.at(2<<30);p t;p t.utc"
ruby 2.5.1p57 (2018-03-29 revision 63029) [x86_64-linux]
2038-01-19 12:14:08 +0900
2038-01-19 03:14:08 UTC
```
--
https://bugs.ruby-lang.org/
next prev parent reply other threads:[~2018-10-09 13:05 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <redmine.issue-15177.20180929111256@ruby-lang.org>
2018-09-29 11:12 ` [ruby-dev:50642] [Ruby trunk Bug#15177] 起動した後にTZを変更するとTime#utcがずれることがある zn
2018-10-09 2:10 ` [ruby-dev:50650] " naruse
2018-10-09 9:15 ` [ruby-dev:50651] " zn
2018-10-09 9:45 ` [ruby-dev:50652] " naruse
2018-10-09 13:04 ` nobu [this message]
2019-12-18 8:34 ` [ruby-dev:50895] [Ruby master " shyouhei
2019-12-18 14:03 ` [ruby-dev:50896] " nobu
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