Crash at _JKDictionaryAddObject

[loretoparisi]

iOS7.1, iPhone4

Thread : Fatal Exception: NSInternalInconsistencyException
0 CoreFoundation 0x2fa12fd3 exceptionPreprocess + 130
1 libobjc.A.dylib 0x3a1bfccf objc_exception_throw + 38
2 CoreFoundation 0x2fa12ead +[NSException raise:format:]
3 Foundation 0x303bfdb7 -[NSAssertionHandler handleFailureInFunction:file:lineNumber:description:] + 86
4 musiXmatch 0x00323b05 _JKDictionaryAddObject (JSONKit.m:999)
5 musiXmatch 0x0032ac9f jk_object_for_token (JSONKit.m:939)
6 musiXmatch 0x0032a83f jk_object_for_token (JSONKit.m:1927)
7 musiXmatch 0x0032a83f jk_object_for_token (JSONKit.m:1927)
8 musiXmatch 0x00324953 _JKParseUTF8String (JSONKit.m:1951)
9 musiXmatch 0x003250bf -JSONDecoder objectWithData:error:
10 musiXmatch 0x0033a11f -MXMLoader mXmRequestDidFinish:withCache:
11 musiXmatch 0x00334801 -MXMArtistInfoLoader mXmRequestDidFinish:
12 musiXmatch 0x0036aec9 -ASIHTTPRequest reportFinished
13 Foundation 0x303fbc73 __NSThreadPerformPerform + 386
14 CoreFoundation 0x2f9de25b __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION + 14
15 CoreFoundation 0x2f9dd72b __CFRunLoopDoSources0 + 206
16 CoreFoundation 0x2f9dbf1f __CFRunLoopRun + 622
17 CoreFoundation 0x2f946f4f CFRunLoopRunSpecific + 522
18 CoreFoundation 0x2f946d33 CFRunLoopRunInMode + 106
19 GraphicsServices 0x3484b663 GSEventRunModal + 138
20 UIKit 0x3229216d UIApplicationMain + 1136
21 musiXmatch 0x00100407 main (main.m:12)
22 libdyld.dylib 0x3a6ccab7 start + 2