Xcode 5 DP 6 crash when trying to run code on 2 devices simultaneously

Originator:pauley
Number:rdar://14869822 Date Originated:8-29-2013
Status:Open Resolved:
Product:Developer Tools Product Version:
Classification:Crash Reproducible:Always
 
Summary:
Running my app on two devices crashes Xcode.

Steps to Reproduce:
1) Run an app on one iOS device
2) switch to the other device in the device picker menu
3) Run the app on the second device
4) crash

Expected Results:
No Crash

Actual Results:
Crash

Regression:
Used to work in Xcode DP5 as well as Xcode 4

Notes:
Running the app from two devices simultaneously is absolutely critical for debugging device-to-device communication issues.

Comments

Crash log:

Crashed Thread: 0 Dispatch queue: com.apple.main-thread

Exception Type: EXC_CRASH (SIGABRT) Exception Codes: 0x0000000000000000, 0x0000000000000000

Application Specific Information: ProductBuildVersion: 5A11386k ASSERTION FAILURE in /SourceCache/DVTFoundation/DVTFoundation-3524.1/Framework/Classes/FoundationClassCategories/DVTNSKeyValueObserving.m:427 Details: was never cancelled. Backtrace for allocation (if _creationBacktrace is set): 0 0x0000000104f00502 -DVTObservingToken init 1 0x0000000104e56932 -DVTObservingBlockToken initWithObservedObject:owner: 2 0x0000000104f01e52 -NSObject(DVTObservingConvenience) dvtnewObserverForKeyPath:options:owner:withHandlerBlock: 3 0x0000000104e81d33 -NSObject(DVTObservingConvenience) dvt_newObserverForKeyPath:options:withHandlerBlock: 4 0x000000011065c571 _65-[GPUCaptureButtonDebugBarContentProvider wasAttachedToDebugBar:]block_invoke (in GPUTraceDebuggerUI) 5 0x0000000104f013bb _73-[DVTObservingBlockToken observeValueForKeyPath:ofObject:change:context:]block_invoke (in DVTFoundation) 6 0x0000000104f18618 DVTInvokeWithStrongOwnership (in DVTFoundation) 7 0x0000000104e56d59 -DVTObservingBlockToken observeValueForKeyPath:ofObject:change:context: 8 0x00007fff8d4977b7 NSKeyValueNotifyObserver (in Foundation) 9 0x00007fff8d4991c1 NSKeyValueDidChange (in Foundation) 10 0x00007fff8d45476a -NSObject(NSKeyValueObserverNotification) didChangeValueForKey: 11 0x000000011065ad60 _52-[GPUDebugBarContentProvider wasAttachedToDebugBar:]block_invoke (in GPUTraceDebuggerUI) 12 0x0000000104f013bb _73-[DVTObservingBlockToken observeValueForKeyPath:ofObject:change:context:]block_invoke (in DVTFoundation) 13 0x0000000104f18618 DVTInvokeWithStrongOwnership (in DVTFoundation) 14 0x0000000104e56d59 -DVTObservingBlockToken observeValueForKeyPath:ofObject:change:context: 15 0x00007fff8d49966d -NSKeyValueObservance observeValueForKeyPath:ofObject:change:context: 16 0x00007fff8d4977b7 NSKeyValueNotifyObserver (in Foundation) 17 0x00007fff8d4991c1 NSKeyValueDidChange (in Foundation) 18 0x00007fff8d45476a -NSObject(NSKeyValueObserverNotification) didChangeValueForKey: 19 0x0000000106068bc9 -IDEWorkspaceTabController setCurrentLaunchSession: 20 0x00000001061182e4 _43-[IDEWorkspaceTabController viewDidInstall]block_invoke (in IDEKit) 21 0x0000000104f013bb _73-[DVTObservingBlockToken observeValueForKeyPath:ofObject:change:context:]block_invoke (in DVTFoundation) 22 0x0000000104f18618 DVTInvokeWithStrongOwnership (in DVTFoundation) 23 0x0000000104e56d59 -DVTObservingBlockToken observeValueForKeyPath:ofObject:change:context: 24 0x00007fff8d49966d -NSKeyValueObservance observeValueForKeyPath:ofObject:change:context: 25 0x00007fff8d4977b7 NSKeyValueNotifyObserver (in Foundation) 26 0x00007fff8d4991c1 NSKeyValueDidChange (in Foundation) 27 0x00007fff8d45476a -NSObject(NSKeyValueObserverNotification) didChangeValueForKey: 28 0x000000010594d472 -IDEExecutionEnvironment setCurrentLaunchSession: 29 0x000000010594af03 -IDEExecutionEnvironment setSelectedLaunchSession: 30 0x000000010594d290 -IDEExecutionEnvironment _handleLaunchSession:stateChange: 31 0x000000010593b5c2 -IDEExecutionEnvironment observeValueForKeyPath:ofObject:change:context: 32 0x00007fff8d4977b7 NSKeyValueNotifyObserver (in Foundation) 33 0x00007fff8d4991c1 NSKeyValueDidChange (in Foundation) 34 0x00007fff8d45476a -NSObject(NSKeyValueObserverNotification) didChangeValueForKey: 35 0x00000001059511a6 -IDERunOperation runningDidFinish 36 0x00000001059510e0 -IDERunOperation _runningTrackerFinished: 37 0x0000000104f013bb _73-[DVTObservingBlockToken observeValueForKeyPath:ofObject:change:context:]block_invoke (in DVTFoundation) 38 0x0000000104f18618 DVTInvokeWithStrongOwnership (in DVTFoundation) ...

By pauley at Sept. 11, 2013, 5:53 p.m. (reply...)

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