SIGSEGV Crash en iOS Dispositivo TestFlight

Question

Tengo un bloqueo extraño que solo ocurre en las distribuciones ad hoc de TestFlight. Sé lo que está causando el bloqueo (un simple ciclo while, ver abajo), pero no entiendo por qué no se cuelga en mi simulador ni iPhone o iPad (con un perfil de desarrollo).

Estoy constantemente distribuyendo compilaciones adhoc para rastrear el bloqueo, pero finalmente me di por vencido. ¿Cómo puedo rastrear este error de manera más eficiente?

Aquí está el informe de bloqueo TestFlight:

Exception reason 

SIGSEGV 

Stacktrace 

PRIMARY THREAD THREAD 0 

0 Meernotes 0x0019649a testflight_backtrace + 158 
1 Meernotes 0x001970c4 TFSignalHandler + 244 
2 libsystem_c.dylib 0x32d9d7ec _sigtramp + 48 
3 libobjc.A.dylib 0x37d34eac _ZN12_GLOBAL__N_119AutoreleasePoolPage3popEPv + 224 
4 libobjc.A.dylib 0x37d34eac _ZN12_GLOBAL__N_119AutoreleasePoolPage3popEPv + 224 
5 libobjc.A.dylib 0x37d34dc8 _objc_autoreleasePoolPop + 12 
6 CoreFoundation 0x358e1cfe _CFAutoreleasePoolPop + 18 
7 UIKit 0x333d5c92 _wrapRunLoopWithAutoreleasePoolHandler + 42 
8 CoreFoundation 0x35965b1a __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 18 
9 CoreFoundation 0x35963d56 __CFRunLoopDoObservers + 258 
10 CoreFoundation 0x359640b0 __CFRunLoopRun + 760 
11 CoreFoundation 0x358e74a4 CFRunLoopRunSpecific + 300 
12 CoreFoundation 0x358e736c CFRunLoopRunInMode + 104 
13 GraphicsServices 0x37583438 GSEventRunModal + 136 
14 UIKit 0x333f3cd4 UIApplicationMain + 1080 
15 Meernotes 0x000850da main (main.m:16) 
16 Meernotes 0x0008508f start + 39 

Y aquí es el código que está provocando que (pero que está muy bien en el simulador/iPhone):

 while (textStillFits) { 

     textToBeKeptBeforeCutting = textToBeKept; 
     textToBeMovedBeforeCutting = textToBeMoved; 

     rangeCutOffPosition = [settings determineFirstCutOffRangeOfString:textToBeMoved]; 
     textToBeKeptTemp = [textToBeMoved substringToIndex:rangeCutOffPosition.location]; 
     textToBeMovedTemp = [textToBeMoved substringFromIndex:rangeCutOffPosition.location]; 
     textToBeMoved = textToBeMovedTemp; 
     textToBeKept = [NSString stringWithFormat:@"%@%@", textToBeKept, textToBeKeptTemp]; 
     NSUInteger l = [settings linesOfText:textToBeKept]; 
     if (l > maxLines) { 
      textStillFits = NO; 
      textToBeKept = textToBeKeptBeforeCutting; 
      textToBeMoved = textToBeMovedBeforeCutting; 
      // brakes here! 
     }else { 
      textStillFits = YES; 
     } 
    } 

tuve un vistazo a este , pero no ayudó: ad hoc iphone sigsegv crash

Un poco más de contexto, como @ott mencionó que NSNotFound puede causar esto:

-(NSRange)determineFirstCutOffRangeOfString:(NSString *)s { 

    NSRange rangeSpace = [s rangeOfString:@" " options:NSCaseInsensitiveSearch]; 
    NSRange rangeReturn = [s rangeOfString:@"\n" options:NSCaseInsensitiveSearch]; 
    if (rangeSpace.location == NSNotFound && rangeReturn.location == NSNotFound) { 
     rangeSpace = NSMakeRange(1, 0); // don't take 0,0 as this will lead to endless loop 
     rangeReturn = NSMakeRange(1, 0); 
     NSLog(@"NEITHER SPACE NOR RETURN FOUND"); 
    } 

    NSRange rangeCutOffPosition = NSMakeRange(0, 0); 
    if (rangeSpace.location < rangeReturn.location) { 
     // i.e. if the space char is the lowest char where you can cut off 
     rangeCutOffPosition = NSMakeRange(rangeSpace.location+1,0); // +1, i.e. always cut off AFTER the space 
    } else { 
     // i.e. if the return char is the lowest char where you can cut off 
     rangeCutOffPosition = NSMakeRange(rangeReturn.location+1,0); // +1, i.e. always cut off AFTER the return 
    } 

    return rangeCutOffPosition; 
} 

Answer 1

¡Su último sdk 1.2.4 soluciona el problema!