NSIndexSet indexesInRange:... dies with empty range

Originator:me
Number:rdar://10908993 Date Originated:21-Feb-2012 10:07 PM
Status:Duplicate/7443208 Resolved:
Product:Mac OS X Product Version:10.7.3 (11D50)
Classification:Crash/Hang/Data Loss Reproducible:Always
 
Calling -[NSIndexSet indexesInRange:options:passingTest:] with an empty range throws an exception:

*** Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[NSIndexSet indexesInRange:options:passingTest:]: last range index (-1) beyond bounds (9223372036854775806)'

This should be valid and return an empty index set. -[NSIndexSet countOfIndexesInRange:] returns 0, and similar methods also correctly handle an empty range. The attached file shows this.

% clang -fobjc-arc -framework Foundation -o indexset indexset.m
% ./indexset
2012-02-21 21:58:29.280 indexset[49158:707] halfRange = {0, 3}
2012-02-21 21:58:29.282 indexset[49158:707] indexes in halfRange: 3
2012-02-21 21:58:29.283 indexset[49158:707] array of 6: <NSIndexSet: 0x7fba19d003c0>[number of indexes: 3 (in 1 ranges), indexes: (0-2)]
2012-02-21 21:58:29.284 indexset[49158:707] halfRange = {0, 0}
2012-02-21 21:58:29.285 indexset[49158:707] indexes in halfRange: 0
2012-02-21 21:58:29.286 indexset[49158:707] *** Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[NSIndexSet indexesInRange:options:passingTest:]: last range index (-1) beyond bounds (9223372036854775806)'
*** First throw call stack:
(
	0   CoreFoundation                      0x00007fff97879fc6 __exceptionPreprocess + 198
	1   libobjc.A.dylib                     0x00007fff97a40d5e objc_exception_throw + 43
	2   Foundation                          0x00007fff91c02170 __NSIndexSetParameterCheckIterate + 126
	3   Foundation                          0x00007fff91c679ad -[NSIndexSet indexesInRange:options:passingTest:] + 85
	4   indexset                            0x0000000101e45d25 firstHalfIndexes + 421
	5   indexset                            0x0000000101e45b29 main + 345
	6   indexset                            0x0000000101e459c4 start + 52
	7   ???                                 0x0000000000000001 0x0 + 1
)
terminate called throwing an exception[1]    49158 abort      ./indexset

Comments

indexset.m

#import <Foundation/Foundation.h>


static NSIndexSet *firstHalfIndexes(NSArray *ary)
{
    NSIndexSet *is = [NSIndexSet indexSetWithIndexesInRange:NSMakeRange(0, ary.count)];
    NSRange halfRange = {0, ary.count / 2};
    NSLog(@"halfRange = %@", NSStringFromRange(halfRange));
    NSLog(@"indexes in halfRange: %lu", [is countOfIndexesInRange:halfRange]);
    return [is indexesInRange:halfRange options:0 passingTest:^BOOL(NSUInteger idx, BOOL *stop) { return YES; }];
}


int main(int argc, const char *argv[])
{
    @autoreleasepool {
        NSLog(@"array of 6: %@", firstHalfIndexes([NSArray arrayWithObjects:@"0", @"1", @"2", @"3", @"4", @"5", nil]));
        NSLog(@"array of 0: %@", firstHalfIndexes([NSArray array]));
    }
    return 0;
}
By me at Feb. 23, 2012, 11:02 a.m. (reply...)

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