> On Sep 9, 2014, at 6:09 PM, Rick Mann <rm...@latencyzero.com> wrote:
>
> I downloaded Xcode 6 GM and rebuilt my app. Running in the 7.1 or 8.0
> simulator, it crashes when attempting to present a modal view controller that
> worked fine when built with 5.1.1. The debugger stops at the main entry point
> with this useless stack. Attempting to continue results in a SIGABRT. Adding
> a C++ try/catch block around it results in the catch (...) block being called
> (it is not an int or std::exception being thrown). There is nothing in the
> console. Any ideas on how to proceed?
>
> #0 0x04142a6b in objc_exception_throw ()
> #1 0x0456fa11 in -[NSException raise] ()
> #2 0x023b2d5e in -[NSObject(NSKeyValueCoding) setValue:forUndefinedKey:] ()
> #3 0x0230ed88 in _NSSetUsingKeyValueSetter ()
> #4 0x0230ed0d in -[NSObject(NSKeyValueCoding) setValue:forKey:] ()
> #5 0x023445f6 in -[NSObject(NSKeyValueCoding) setValue:forKeyPath:] ()
> #6 0x032bf329 in -[UIRuntimeOutletConnection connect] ()
It's an Objective-C exception. You can catch it with `@try { … } @catch
(NSException *e) { … }`.
The crash log will show more details about the content of the exception. In
Xcode, run until the debugger stops at the crash, then run `detach` in the lldb
console. That will disconnect the debugger and allow the process to finish
crashing, at which point the OS will collect a crash log.
An exception thrown by -setValue:forUndefinedKey: is probably
NSUndefinedKeyException, "[YourClassNameHere setValue:forUndefinedKey:]: this
class is not key value coding-compliant for the key YourKeyNameHere". That in
turn is probably because your nib is trying to connect an outlet that your
class does not define.
--
Greg Parker gpar...@apple.com Runtime Wrangler
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