Issue #14790 has been updated by nagachika (Tomoyuki Chikanaga).

Backport changed from 2.3: REQUIRED, 2.4: DONE, 2.5: REQUIRED to 2.3: REQUIRED, 2.4: DONE, 2.5: DONE

ruby_2_5 r64431 merged revision(s) 63512,63514.

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Bug #14790: DateTime.iso8601 parses incorrect ISO8601
https://bugs.ruby-lang.org/issues/14790#change-73584

* Author: Quintasan (Micha Zajc)
* Status: Closed
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: 2.4.2p198
* Backport: 2.3: REQUIRED, 2.4: DONE, 2.5: DONE
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I noticed it today when migrating to Time in my library but DateTime somehow parses incorrect ISO8601 dates. Technically that's a feature but I believe this behaviour is incorrect. Time#iso8601 behaves correctly in this case.

# Steps to reproduce

~~~ ruby
require 'time'
date = "2018-05-17T12:17:11+0200"
DateTime.iso8601(date) # => #<DateTime: 2018-05-17T12:17:11+02:00 ((2458256j,37031s,0n),+7200s,2299161j)>
Time.iso8601(date) # ArgumentError: invalid date: "2018-05-17T12:17:11+0200"
~~~





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