iOS 14.2 app crashes in arm64e dev… | Apple Developer Forums

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iOS 14.2 applications developed using Xamarin are crashing in arm64e CPU devices. These Xamarin apps are deployed using a Mobile Device Management tool(Airwatch or Microsoft Intune). However, the same iOS apps work fine in iOS 14.2 when it is installed via the App Store.

We have seen this issue in Xamarin iOS apps like-
Microsoft Azure
Microsoft Seeing AI, etc.

Steps to reproduce,

Configure an MDM tool
Deploy a Xamarin based iOS app to arm64e device (like iPhone 11)
Launch the app after installation

Expected result:
The app should launch and work as expected

Actual result:
The app crashes after 20 seconds with the following error -
Exception Type: EXCBADACCESS (SIGKILL)
Exception Subtype: UNKNOWN0x32 at 0x0000000106464018
VM Region Info: 0x106464018 is in 0x106464000-0x106468000; bytes after start: 24 bytes before end: 16359
REGION TYPE START - END [ VSIZE] PRT/MAX SHRMOD REGION DETAIL
VMALLOCATE 106460000-106464000 [ 16K] rw-/rwx SM=PRV

--> mapped file 106464000-106468000 [ 16K] r-x/r-x SM=COW ...tid=969d6cc3

VMALLOCATE 106468000-1064e8000 [ 512K] rw-/rwx SM=PRV

Termination Reason: Namespace SPRINGBOARD, Code 0x8badf00d
Termination Description: SPRINGBOARD, <RBSTerminateContext| domain:10 code:0x8BADF00D explanation:process-launch watchdog transgression: application<com.microsoft.azure>:1696 exhausted real (wall clock) time allowance of 20.00 seconds | ProcessVisibility: Foreground | ProcessState: Running | WatchdogEvent: process-launch | WatchdogVisibility: Foreground | WatchdogCPUStatistics: ( | "Elapsed total CPU time (seconds): 24.050 (user 24.050, system 0.000), 20% CPU", | "Elapsed application CPU time (seconds): 20.001, 17% CPU" | ) reportType:CrashLog maxTerminationResistance:Interactive>
Triggered by Thread: 0

Thread 0 name: tid_407 Dispatch queue: com.apple.main-thread

13k

Posted by

MViquar

Reply

Replies

It could be interesting to try and find if we have more in common than MDM, iOS 14.2, new devices and Xamarin. When I look at my crash logs, it seems to be pointing to Firebase ->

Binary Images:
0x100818000 - 0x104313fff <APPNAME> arm64 <3126bb8e603136a4a13b2c6c62e6500e> /var/containers/Bundle/Application/<UUID>/<APPNAME>.app/<APPNAME>
0x104854000 - 0x10488bfff FirebaseMessaging arm64 <d70a4d9b0fd23dc9854372da0d304cf2> /var/containers/Bundle/Application/<UUID>/<APPNAME>.app/Frameworks/FirebaseMessaging.framework/FirebaseMessaging
0x1048b4000 - 0x1048c7fff FirebaseCore arm64 <a986f726bd943fb29b706326b0fd20f4> /var/containers/Bundle/Application/<UUID>/<APPNAME>.app/Frameworks/FirebaseCore.framework/FirebaseCore

Firebase is a commonly used service, it wouldn't be surprising if all our solutions are using it.

Posted by

simbel

Any workaround ?

Posted by

YYHYH

Also a major issue for our app. Seems to be only for apps deployed via MDM on ARM64 with iOS 14.2.

1,000s of affected users for a life critical application (health).

Posted by

mistersee

I think these are the commonalities:

OS: iOS 14.2, iOS 14.3 Beta 1, iOS 14.3 Beta 2
Apps: Any Xamarin.iOS app (even apps that don't use any external dll/nuget libraries crash)
Hardware: Any arm64e cpu device (ex: iPad Pro 11" 1st/2nd gen, iPad Pro 12.9" 3rd/4th gen, iPad 8th gen, iPad Air 3rd/4th gen, iPhone 11, etc)
Deployment: Deployed via any MDM or the Apple Configurator 2 from an App Store source (Ad-hoc .ipa deployment works fine even via MDM or Apple Configurator 2, direct Apple Store app install works fine)

Posted by

Optikam

Same issue, all our users using MDM are effected. Devices running iOS 14.2 are not loading our app

Posted by

Bharat_Kolla011

Thank you all for these reports. We are investigating this, and can use your help with the investigation.

To start, please file a bug report detailing your setup, including whether your app was built using "native" Xcode or using a third-party environment (such as Xamarin, as noted in a few of your reports), what device(s) you're using, and what mechanism you're using to install the app (if using MDM, which provider?).

Additionally, to help determine possible culprits, please perform the following steps, and include the results in your bug report.

First, create either an Enterprise, Development, or Ad Hoc-distributed build, and for the distribution options, enable the App Thinning and Rebuild from Bitcode options.

(Distributing Your App for Beta Testing and Releases describes this process.)

Next, use Configurator 2 and load the app, with the MDM profile, onto the targeted device. Run the app and note in your bug report if this results in a working app or not.

Please include the following in your report:

Symbolicated crash logs.
Logs that you have gathered from the console when the hang took place.
Sysdiagnose [1] on the device after the hang took place.
The time and date you performed these steps.

Once you file your bug report, please add your FB number to this thread so we can track them.

Thanks for your help tracking this down,

—jasonag.

[1] To create an iOS sysdiagnose, perform the following steps:

On the device after you have reproduced the issue, hit the up and down volume buttons at the same time. You will notice a slight vibration. Note the time you do this.
Wait about 5-10 minutes, and navigate to Settings -> Privacy -> Analytics & Improvements.
Scroll down to the bottom of the list and find the entry for sysdiagnose_todays_date.
Select this file and Air Drop it to a computer.
Zip the sysdiagnose_todays_date file and upload it to the bug report.
Note the time from Step 1 in your bug report.

Posted by

Jason

Hi all,

we are also experiencing this issue. Please prioritise this issue.

Posted by

SKoivisto

This issue is affecting our airline and we have pilots that cannot open a couple of crucial apps because of this. I hope there is a solution very soon! 🤞

Posted by

efb-admin

Submitted FB8907917 with symbolicated crash log, sysdiagnose and other info requested by Jason @ Apple below.

https://feedbackassistant.apple.com/feedback/8907917

Posted by

reknab.velsol

Submitted FB8914570 for this issue with the required information as requested by jasonag in this thread.
https://feedbackassistant.apple.com/feedback/8914570

Posted by

ramit_123214

Same issue here!

Is there any expected resolution date?

Is there any workaround to avoid this problem?

Posted by

Captio

We are also experiencing this issue with our Xamarin application. Please prioritize this issue.

Posted by

MatthewR

Our application is also experiencing this issue. Xamarin app works on 13.5 and MDM does not work on 14.2 and MDM deployment. Works if installed from the store.

Posted by

bara.cek

I have provided a feedback on https://feedbackassistant.apple.com/form-response/18248318

Posted by

dedata

Hi all,
same here, app installed via Apple Store works fine, but crashes when installed via MDM.

Posted by

Guol