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[SR-12104] ISO8601DateFormatter fails to parse "2013-11-01T00:00.00Z" #4480

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swift-ci opened this issue Jan 29, 2020 · 4 comments
Open

[SR-12104] ISO8601DateFormatter fails to parse "2013-11-01T00:00.00Z" #4480

swift-ci opened this issue Jan 29, 2020 · 4 comments
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@swift-ci
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Previous ID SR-12104
Radar rdar://problem/58999127
Original Reporter gkaindl (JIRA User)
Type Bug

Attachment: Download

Environment

Swift 5.1.3

Date: December 13, 2019
Tag: swift-5.1.3-RELEASE

on Ubuntu 18.04

Additional Detail from JIRA
Votes 0
Component/s Foundation
Labels Bug
Assignee None
Priority Medium

md5: 2edc9a53797eff6716707dfa50f8b190

relates to:

  • SR-13218 Swift's ISO8601DateFormatter doesn't parse all valid RFC3339 dates

Issue Description:

See the attached test.swift file, which (correctly) prints "Optional(2013-11-01 00:00:00 +0000)" on macOS 10.14 and macOS 10.15, but prints "nil" on Linux.

Since the test program is so short, I'll also include it here:

import Foundation

let formatter = ISO8601DateFormatter()
let date = formatter.date(from: "2013-11-01T00:00.00Z")

print(date as Any)

Unfortunately, I currently do not have a fully debuggable environment set up on Linux, but only caught this problem through a unit test (I'm developing on macOS).

The unit test includes a lot of other date strings that are all parsed correctly, but this particular one always evaluates to nil.
@weissi
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weissi commented Jan 29, 2020

confirmed:

$ for f in 5.0 5.1 5.2 master; do jw-docker-swift-$f swift date.swift; done
nil
nil
nil
nil
$ swift date.swift  ## macOS
Optional(2013-11-01 12:00:00 am +0000)

@weissi
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weissi commented Jan 29, 2020

CC @millenomi/@spevans

@spevans
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spevans commented Jan 29, 2020

Testing with corelibs-foundation on macOS it does actually work so I suspect this is a difference between Apple's ICU fork and regular ICU. The decimal point seems to be the actual issue so it might be possible to do a work around. However dates ending in a .00Z format don't not seem to be officially supported according to the list https://developer.apple.com/documentation/foundation/iso8601dateformatter/1643324-formatoptions

@beccadax
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@swift-ci create

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
@shahmishal shahmishal transferred this issue from apple/swift May 5, 2022
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@weissi @beccadax @spevans @swift-ci