NSRangeException using sortedArrayUsingComparator

Asked Feb 03 '15 at 04:36

Active Feb 03 '15 at 16:59

Viewed 197 times

I am sometimes seeing this exception in Crashlytics:

Fatal Exception: NSRangeException
*** -[__NSArrayM getObjects:range:]: range {0, 6294} extends beyond bounds [0 .. 6292]
-[NSMutableArray sortUsingSelector:]
-[NSArray sortedArrayFromRange:options:usingComparator:] + 284

I understand the message, but unfortunately I cannot find a reproducible sequence or root cause, though it seems to occur more often with larger data sets.

This is the related code that does the sorting, where the crash is occuring:

NSMutableArray *contacts = ...; // loaded from another method, in an NSOperation
NSArray *result = [contacts sortedArrayUsingComparator:^NSComparisonResult(Contact *obj1, Contact *obj2) {
        return [obj1.fullName compare:obj2.fullName];
    }];

Thanks for any suggestions!

EDIT: Here is a pastebin of the full exception from Crashlytics - http://pastebin.com/T2haqCWX

edited Feb 03 '15 at 16:59

asked Feb 03 '15 at 04:36

ebi

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Is the array getting mutated by any thread at the time the sorting happens? – Shanti K Feb 03 '15 at 04:56
This is immutable array, mutable copy is created internally for sorting and cannot be accessed by anyone else, so probably not the case. Edit: realised that didn't see declaration for contacts. Fair point. – Sash Zats Feb 03 '15 at 05:44
Can you post more info from crabslytics? Pastebin or gist… – Sash Zats Feb 03 '15 at 05:46
I added a pastebin with the full exception, thanks! – ebi Feb 03 '15 at 17:03
@SashZats any thoughts? – ebi Feb 11 '15 at 04:27
It looks like Shanti might be right. Any chance you are mutating the same array from a different thread? – Sash Zats Feb 11 '15 at 13:01

NSRangeException using sortedArrayUsingComparator

0 Answers0