NSNumberFormatter misinterpreting NSUInteger as NSInteger during formatting.

Originator:regexident
Number:rdar://19068423 Date Originated:22-Nov-2014 09:25 PM
Status:Open Resolved:
Product:OS X Product Version:Mac OS X 10.10
Classification:Serious Bug Reproducible:Always
 
Summary:

NSNumberFormatter appears to falsely interpret 64bit unsigned integer (a.k.a NSUInteger on 64bit) NSNumbers (“NSNumber(unsignedLongLong: …)”) as 64bit signed(!) integer (a.k.a NSInteger on 64bit) NSNumbers when formatting.

Steps to Reproduce:

Swift Playground:

	import Cocoa // or UIKit

	let uint64_max: UInt64 = UInt64.max
	let uint64_max_number = NSNumber(unsignedLongLong: uint64_max)
	let uint64_max_string = NSNumberFormatter().stringFromNumber(uint64_max_number)!

Expected Results:

Playground console log:

	18446744073709551615
	18446744073709551615
	“18446744073709551615”

Actual Results:

Playground console log:

	18446744073709551615
	18446744073709551615
	“-1”

Regression:

Notes:
This also occurs with the Objective-C side of things (on both iOS and OS X). It’s thus not purely Swift-related.

Comments


Please note: Reports posted here will not necessarily be seen by Apple. All problems should be submitted at bugreport.apple.com before they are posted here. Please only post information for Radars that you have filed yourself, and please do not include Apple confidential information in your posts. Thank you!