iOS Simulator in Xcode 7.1: Frequent pinwheels and hangs

Originator:igeek1
Number:rdar://23333426 Date Originated:30-Oct-2015 12:22 PM
Status:Duplicate of 23119664 (Closed) Resolved:04-Nov-2015 03:24 AM
Product:Developer Tools Product Version:Simulator 9.1 (635.5)
Classification:Crash/Hang/Data Loss Reproducible:Always
 
Summary:
The Xcode 7.1 simulator has been pinwheeling fairly regularly.

Steps to Reproduce:
1. Run any app, including several of my own and the built-in apps like Safari.
2. Try to do anything - keyboard input, scrolling, panning maps, tapping buttons, navigating in a UINavigationController.

Expected Results:
App responds normally.

Actual Results:
Simulator freezes up for a few seconds, then the pinwheel of doom appears. It sticks around for a little while (maybe 15 or 20 seconds), then the app is OK for a few seconds, then it locks up and pinwheels again.

Regression:
Didn’t happen in Xcode 7.0.1. Heard from others who have had the same issue. It happens reproducibly on my machine, but some people on my team running 7.1 haven’t seen it at all.

Notes:
Tried blowing away and re-creating simulators. I’ve tried to figure out which process is hanging in Activity Monitor.app so I can attach a sample to this radar, but I never see one highlighted in red. Happy to take samples or run other diagnostics. Attaching a system report.

Comments

Update: this appears to be caused by assistive applications using accessibility APIs. Filed a new radar: http://www.openradar.me/23504761

By igeek1 at Nov. 11, 2015, 9:14 p.m. (reply...)

Resolved?

I see the status of this bug report is "Duplicate of 23119664". I can't find bug report 23119664. Am I missing something?

By heavycrag at Nov. 5, 2015, 4:12 p.m. (reply...)

Dev forum thread of people having the same problem: https://forums.developer.apple.com/thread/24274

By igeek1 at Nov. 2, 2015, 6:22 p.m. (reply...)

You're not alone...

Definitely also seeing this on my Macbook Pro (16GB RAM), never before had an issue until Xcode 7.1

By joeboyscout04 at Oct. 31, 2015, 2:48 a.m. (reply...)

Please note: Reports posted here will not necessarily be seen by Apple. All problems should be submitted at bugreport.apple.com before they are posted here. Please only post information for Radars that you have filed yourself, and please do not include Apple confidential information in your posts. Thank you!