[SR-1782] SwiftNSCharacterSet unrecognized selector mutableCopyWithZone

[swift-ci]

Previous ID	SR-1782
Radar	None
Original Reporter	ayaka (JIRA User)
Type	Bug
Status	Resolved
Resolution	Done

Attachment: Download

Environment

Xcode version 8.0 beta (8S128d)

Additional Detail from JIRA

Votes	0
Component/s	Foundation
Labels	Bug, RunTimeCrash
Assignee	@phausler
Priority	Medium

md5: e2da46d06a88225b959e11530e4b8ede

is duplicated by:

• SR-2058 CharacterSet.substracting crashes

Issue Description:

Steps to reproduce:

1. Create a Swift playground with the following code:

import Foundation
var nonAlphanumeric = CharacterSet.alphanumerics.inverted
nonAlphanumeric.remove(charactersIn: " ")

2. Wait for it to run
3. Crash

The current workaround is to use NSMutableCharacterSet.alphanumerics() instead

var nonAlphaNumeric = NSMutableCharacterSet.alphanumerics().inverted
nonAlphaNumeric.remove(charactersIn: " ")

I think Philippe just fixed it during a lab but wanted to make sure it gets tracked!

Thanks 😃

[phausler]

For some reason NSCharacterSet requires copyWithZone: and mutableCopyWithZone: to be overridden (even though they both could probably be implemented abstractly via the data representations.

Pushed fixes plus unit tests encapsulating this use case with commit 07f0049e