iOS app crashes at start on iOS 12 (iPhone 6)

[hb9tst]

Summary

iOS app crashes at start on iOS 12 (iPhone 6)

Environment Information

• Device Name: iPhone 6
• OS Version: 12.5.7
• Mattermost App Version: 2.15.0
• Mattermost Server Version: not pertinent

Steps to reproduce

Update the application to 2.15.0 on an iPhone 6 running iOS 12.

Expected behavior

The app should open as expected.

Observed behavior (that appears unintentional)

Apps open then closes without any possible interaction. No error messages whatsoever.

Possible fixes

Mattermost is still declared compatible with iPhone 5s and up, iOS >= 12. The issue might come from the SDK update? If there is a compatibility change and no more support for iOS 12 is planned, and given that downgrade is not possible on iOS, the previous compatible version should be republished with a new version number to allow users to "upgrade" to it and keep working, before proceeding with republishing the new version but after correcting the iOS version compatibility.

[amyblais]

@hb9tst Are you using the official app or the Beta app?

[hb9tst]

It's the official one. Not even sure how to install the beta...

[hb9tst]

Just updated to 2.16.0. Still crashing at startup on iPhone 6.

[amyblais]

We haven't determined the root cause for this issue so far.

Related to this, we are updating our minimum iOS version to v13.4+ in the next release (v2.17.0 June) as part of this PR #7863, but it shouldn't affect v2.15 or v2.6 releases.

[hb9tst]

Ok thanks for your comment -- I hope that a working version on iOS12 will still be published as it's not possible to downgrade the app to a working version...

[amyblais]

iOS 12 went out of support a year ago https://endoflife.date/ios. Would you be able to share more details on the preference to use iOS 12?

[EduardoSellanes]

It may be related to this

https://medium.com/@liwp.stephen/solution-app-crash-on-ios-12-build-from-xcode-15-3e6123e31150