Can't read [/sdk/platforms/android-25/android.jar] (Can't process class [java/text/CollationElementIterator.class] (Unsupported class version number [52.0] (maximum 51.0, Java 1.7)))

[vanniktech]

I'm trying to build a release version of an app using ./buck build appRelease

However it fails:

ProGuard, version 4.7
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__com.android.support.animated-vector-drawable-25.1.0.aar#aar_prebuilt_jar__/classes.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__com.android.support.appcompat-v7-25.1.0.aar#aar_prebuilt_jar__/classes.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__com.android.support.design-25.1.0.aar#aar_prebuilt_jar__/classes.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__com.android.support.recyclerview-v7-25.1.0.aar#aar_prebuilt_jar__/classes.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__com.android.support.support-compat-25.1.0.aar#aar_prebuilt_jar__/classes.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__com.android.support.support-core-ui-25.1.0.aar#aar_prebuilt_jar__/classes.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__com.android.support.support-core-utils-25.1.0.aar#aar_prebuilt_jar__/classes.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__com.android.support.support-fragment-25.1.0.aar#aar_prebuilt_jar__/classes.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__com.android.support.support-media-compat-25.1.0.aar#aar_prebuilt_jar__/classes.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__com.android.support.support-v4-25.1.0.aar#aar_prebuilt_jar__/classes.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__com.android.support.support-vector-drawable-25.1.0.aar#aar_prebuilt_jar__/classes.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__com.android.support.transition-25.1.0.aar#aar_prebuilt_jar__/classes.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__com.crashlytics.sdk.android.answers-1.3.11.aar#aar_prebuilt_jar__/classes.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__com.crashlytics.sdk.android.beta-1.2.3.aar#aar_prebuilt_jar__/classes.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__com.crashlytics.sdk.android.crashlytics-2.6.6.aar#aar_prebuilt_jar__/classes.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__com.crashlytics.sdk.android.crashlytics-core-2.3.15.aar#aar_prebuilt_jar__/classes.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__com.google.android.gms.play-services-basement-10.0.1.aar#aar_prebuilt_jar__/classes.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__com.google.android.gms.play-services-tasks-10.0.1.aar#aar_prebuilt_jar__/classes.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__com.google.firebase.firebase-analytics-10.0.1.aar#aar_prebuilt_jar__/classes.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__com.google.firebase.firebase-analytics-impl-10.0.1.aar#aar_prebuilt_jar__/classes.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__com.google.firebase.firebase-common-10.0.1.aar#aar_prebuilt_jar__/classes.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__com.google.firebase.firebase-core-10.0.1.aar#aar_prebuilt_jar__/classes.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__com.google.firebase.firebase-iid-10.0.1.aar#aar_prebuilt_jar__/classes.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__com.google.firebase.firebase-messaging-10.0.1.aar#aar_prebuilt_jar__/classes.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__com.jakewharton.butterknife-8.5.1.aar#aar_prebuilt_jar__/classes.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__com.jakewharton.timber.timber-4.5.1.aar#aar_prebuilt_jar__/classes.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__com.squareup.leakcanary.leakcanary-android-1.5.aar#aar_prebuilt_jar__/classes.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__io.fabric.sdk.android.fabric-1.3.15.aar#aar_prebuilt_jar__/classes.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__io.reactivex.rxjava2.rxandroid-2.0.1.aar#aar_prebuilt_jar__/classes.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__net.danlew.android.joda-2.9.5.1.aar#aar_prebuilt_jar__/classes.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__com.android.support.support-annotations-25.1.0.jar__/com.android.support.support-annotations-25.1.0.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__com.google.dagger.dagger-2.8.jar__/com.google.dagger.dagger-2.8.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__com.jakewharton.butterknife-annotations-8.5.1.jar__/com.jakewharton.butterknife-annotations-8.5.1.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__com.jakewharton.retrofit.retrofit2-rxjava2-adapter-1.0.0.jar__/com.jakewharton.retrofit.retrofit2-rxjava2-adapter-1.0.0.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__com.ryanharter.auto.value.auto-value-parcel-adapter-0.2.5.jar__/com.ryanharter.auto.value.auto-value-parcel-adapter-0.2.5.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__com.squareup.leakcanary.leakcanary-android-no-op-1.5.aar#aar_prebuilt_jar__/classes.jar]
Note: duplicate definition of program class [com.squareup.leakcanary.LeakCanary]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__com.squareup.moshi.moshi-1.3.1.jar__/com.squareup.moshi.moshi-1.3.1.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__com.squareup.okhttp3.logging-interceptor-3.5.0.jar__/com.squareup.okhttp3.logging-interceptor-3.5.0.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__com.squareup.okhttp3.okhttp-3.5.0.jar__/com.squareup.okhttp3.okhttp-3.5.0.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__com.squareup.okio.okio-1.11.0.jar__/com.squareup.okio.okio-1.11.0.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__com.squareup.retrofit2.converter-moshi-2.1.0.jar__/com.squareup.retrofit2.converter-moshi-2.1.0.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__com.squareup.retrofit2.retrofit-2.1.0.jar__/com.squareup.retrofit2.retrofit-2.1.0.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__io.reactivex.rxjava2.rxjava-2.0.4.jar__/io.reactivex.rxjava2.rxjava-2.0.4.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__javax.inject.javax.inject-1.jar__/javax.inject.javax.inject-1.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__joda-time.joda-time-2.9.6-no-tzdb.jar__/joda-time.joda-time-2.9.6-no-tzdb.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/.okbuck/cache/__org.reactivestreams.reactive-streams-1.0.0.jar__/org.reactivestreams.reactive-streams-1.0.0.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/app/lib__src_release__output/src_release.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/app/lib__bin_release#buildconfig_com_ovyapp_android__output/bin_release#buildconfig_com_ovyapp_android.jar]
Reading program jar [/home/nik/dev/project/buck-out/gen/app/lib__bin_release#compile_uber_r_dot_java__output/bin_release#compile_uber_r_dot_java.jar]
Reading library jar [/home/nik/android/adt-bundle-linux-x86_64-20140702/sdk/platforms/android-25/android.jar]

Error: Can't read [/home/nik/android/adt-bundle-linux-x86_64-20140702/sdk/platforms/android-25/android.jar] (Can't process class [java/text/CollationElementIterator.class] (Unsupported class version number [52.0] (maximum 51.0, Java 1.7)))

BUILD FAILED: //app:bin_release failed with exit code 1:
proguard_obfuscation
stderr: Error: Can't read [/home/nik/android/adt-bundle-linux-x86_64-20140702/sdk/platforms/android-25/android.jar] (Can't process class [java/text/CollationElementIterator.class] (Unsupported class version number [52.0] (maximum 51.0, Java 1.7)))

The project is using Retrolambda and has Java 8 set as compileOptions:

compileOptions {
  sourceCompatibility JavaVersion.VERSION_1_8
  targetCompatibility JavaVersion.VERSION_1_8
}

The machine is having the following Java Version:

java version "1.8.0_60"
Java(TM) SE Runtime Environment (build 1.8.0_60-b27)
Java HotSpot(TM) 64-Bit Server VM (build 25.60-b23, mixed mode)

Building with Gradle works perfectly fine.

[Macarse]

@vanniktech I would recommend you doing a small sample project to reproduce the issue and share it.
I am in the process of migrating a big app and most of my issues end up being a problem with my cfg rather than okBuck.

[vanniktech]

I tried to recreate that problem in a small sample project although I had no luck - otherwise I'd have.

[Macarse]

@vanniktech have you checked the logs? are the proguard versions the same? build tools versions?

Another thing to try:
In my project I add okBuck like this:

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.2.3'
        classpath('com.uber:okbuck:0.15.6') {
          exclude module: 'gradle'
        }
    }
}

without the exclude module it override the version of com.android.tools.build:gradle. AFAIK proguard will depend on the build tools versions, but it won't hurt to try.

[kageiit]

This is because buck is not using the same proguard version as gradle. This can be fixed by setting an explicit proguard jar as done in the sample app in okbuck, but I am also making a change to make buck automatically pickup the same proguard version that ships with the android gradle plugin