Proguard failing Xamarin Android build - Unsupported class version number

ruaan
Mon, 06 Feb 2017 20:51:20 +0000
Builds

Bitrise Build Issue Report template

Description of the issue

Xamarin build for iOS and Android is failing. Seems like the build is related to a the latest pro guard not being installed on your build servers

Environment:

Bitrise. Xamarin Archive step

Fails with the issue:

/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets: error : Tool exited with code: 10. Output: Error: Can’t read [/Library/Frameworks/Xamarin.Android.framework/Versions/7.0.2-42/lib/xbuild-frameworks/MonoAndroid/v7.0/mono.android.jar] (Can’t process class [android/app/ActivityTracker.class] (Unsupported class version number [52.0] (maximum 51.0, Java 1.7)))

Reproducibility

Rebuild simulates issue.

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