Xcode 6.4: Trying to Run App on Real Device Hangs Xcode - Requires Force Quit

Originator:sethfri
Number:rdar://21882180 Date Originated:17-Jul-2015 03:21 PM
Status:Open Resolved:
Product:Developer Tools Product Version:Xcode 6.4 (6E35b)
Classification:Crash/Hang/Data Loss Reproducible:Sometimes
 
Summary:
When trying to run an app on a real device (issue does not occur on any iOS Simulator), Xcode will say "Running on [Device Name]", but the app will never open on the device. When you click the Stop button, nothing stops. Unplugging the device results in the device name still appearing in the device dropdown. The only way to get back to a state that has the Run button is to force quit Xcode. Running the app generally works the next time you run Xcode, but eventually after a couple of times of running, the hang will occur again.

Steps to Reproduce:
1. Click the Run button with a real device (tested with iPhone 6 (iOS 8.3) and iPhone 6+ (iOS 8.4)
2. Occasionally, the app will never open automatically on the iPhone
3. Try to press Stop - nothing happens
4. Force quit Xcode because nothing else works

Expected Results:
I expect Xcode to never hang and to always automatically open the app I'm trying to run on the device I have plugged in.

Actual Results:
Xcode does the described behavior. 

Regression:
I don't remember this ever occurring on Xcode 6.3, but I'm not 100% positive.

Comments

Apple Developer Relations

Engineering has requested the following information in order to further investigate this issue:

Please sample Xcode via Terminal with 'sample Xcode' and attach the output to this report.

More information about using "Sample" may be found on its man page, which can be retrieved by entering "man sample" in the Terminal.

By sethfri at Aug. 18, 2015, 12:02 a.m. (reply...)

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