The `ISO8601DateFormatter.Options.withFractionalSeconds` option for ISO8601DateFormatter causes an exception; CFDateFormatter is fine

Originator:seergypro
Number:rdar://35660658 Date Originated:November 22 2017
Status:Open Resolved:
Product:Foundation Product Version:Xcode 9.1 (9B55)
Classification: Reproducible:Always
 
Area:
Foundation

Summary:

Setting the `ISO8601DateFormatter.Options.withFractionalSeconds` option for ISO8601DateFormatter causes an exception.

Steps to Reproduce:

Run the following code


let cfDateFormatter = CFDateFormatterCreateISO8601Formatter(kCFAllocatorDefault,
                                                            [.withFractionalSeconds, .withInternetDateTime])

let string = CFDateFormatterCreateStringWithDate(kCFAllocatorDefault,
                                                 cfDateFormatter,
                                                 CFDateCreate(kCFAllocatorDefault, CFAbsoluteTimeGetCurrent()))!

print("CFDateFormatter: \(string)\n\n") // This works

/* ========================================================================================================== */

let isoDateFormatter = ISO8601DateFormatter()

isoDateFormatter.formatOptions = [.withFullTime, .withFractionalSeconds] // CRASH

print("ISO8601DateFormatter: \(isoDateFormatter.string(from: Date()))\n\n")

Expected Results:

The console output must be:
CFDateFormatter: 2017-11-22T01:28:13.584+03:00


ISO8601DateFormatter: 2017-11-22T01:28:13.584+03:00



Actual Results:
The app crashes with an uncaught exception, the console output is:

CFDateFormatter: 2017-11-22T01:28:13.584+03:00


2017-11-22 01:28:13.597316+0300 ISO8601Test[49583:14603924] *** Assertion failure in -[NSISO8601DateFormatter setFormatOptions:], /BuildRoot/Library/Caches/com.apple.xbs/Sources/Foundation_Sim/Foundation-1445.30/String.subproj/NSISO8601DateFormatter.m:66
2017-11-22 01:29:16.015562+0300 ISO8601Test[49583:14603924] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Invalid parameter not satisfying: formatOptions == 0 || !(formatOptions & ~(NSISO8601DateFormatWithYear | NSISO8601DateFormatWithMonth | NSISO8601DateFormatWithWeekOfYear | NSISO8601DateFormatWithDay | NSISO8601DateFormatWithTime | NSISO8601DateFormatWithTimeZone | NSISO8601DateFormatWithSpaceBetweenDateAndTime | NSISO8601DateFormatWithDashSeparatorInDate | NSISO8601DateFormatWithColonSeparatorInTime | NSISO8601DateFormatWithColonSeparatorInTimeZone | NSISO8601DateFormatWithFullDate | NSISO8601DateFormatWithFullTime | NSISO8601DateFormatWithInternetDateTime))'

Version/Build:
Xcode 9.1 (9B55), iOS 11.1

Comments

workaround NSISO8601DateFormatter *formatter = [[NSISO8601DateFormatter alloc] init]; 

Ivar ivar = class_getInstanceVariable([NSISO8601DateFormatter class], "_formatOptions");

CFTypeRef formatterRef = CFBridgingRetain(formatter);
int *ivarPtr = (int *)((uint8_t *)formatterRef + ivar_getOffset(ivar));
*ivarPtr = NSISO8601DateFormatWithInternetDateTime | NSISO8601DateFormatWithFractionalSeconds;
CFBridgingRelease(formatterRef);
[formatter valueForKey:@"updateFormatter"];

NSLog(@"%@", [formatter stringFromDate:[NSDate date]]);
By mndgs.paukste at Nov. 23, 2017, 9:54 a.m. (reply...)

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