Okhttp: R8 NullPointerException with OkHttp 3.13.1

[tasomaniac]

When I upgrade to OkHttp 3.13.1, my release builds with R8 fails to build.

Versions that I have:
OkHttp: 3.13.1
Android Gradle Plugin: 3.3.1
Gradle: 5.1.1

Note: Tried with r8 dependency latest version: 1.3.52 and with whatever AGP 3.3.1 ships with.

Here is my gradle.properties

android.enableR8=true
android.enableR8.fullMode=true

And here is the stacktrace of the build.

> Task :app:transformClassesAndResourcesWithR8ForExtranetRelease
R8 is an experimental feature. If you experience any issues, please file a bug at
https://issuetracker.google.com, using 'Shrinker (R8)' as component name. You can
disable R8 by updating gradle.properties with 'android.enableR8=false'.

/Users/sdane/dev/wf/waystation-app/android/app/build/intermediates/proguard-files/proguard-android-optimize.txt-3.3.1:17:2-23: D8: Ignoring option: -optimizationpasses

/Users/sdane/.gradle/caches/transforms-2/files-2.1/d290ba94b37fb20f73ba886f45da97b9/jetified-okhttp-3.13.1.jar: D8: Type `org.conscrypt.Conscrypt` was not found, it is required for default or static interface methods desugaring of `void okhttp3.internal.platform.ConscryptPlatform.configureSslSocketFactory(javax.net.ssl.SSLSocketFactory)`

> Task :app:transformClassesAndResourcesWithR8ForExtranetRelease FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:transformClassesAndResourcesWithR8ForExtranetRelease'.
> java.lang.NullPointerException (no error message)

* Try:
Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Exception is:
org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':app:transformClassesAndResourcesWithR8ForExtranetRelease'.
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:95)
        at org.gradle.api.internal.tasks.execution.ResolveTaskOutputCachingStateExecuter.execute(ResolveTaskOutputCachingStateExecuter.java:91)
        at org.gradle.api.internal.tasks.execution.ResolveBuildCacheKeyExecuter.execute(ResolveBuildCacheKeyExecuter.java:79)
        at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:57)
        at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:119)
        at org.gradle.api.internal.tasks.execution.ResolvePreviousStateExecuter.execute(ResolvePreviousStateExecuter.java:43)
        at org.gradle.api.internal.tasks.execution.CleanupStaleOutputsExecuter.execute(CleanupStaleOutputsExecuter.java:93)
        at org.gradle.api.internal.tasks.execution.FinalizePropertiesTaskExecuter.execute(FinalizePropertiesTaskExecuter.java:45)
        at org.gradle.api.internal.tasks.execution.ResolveTaskArtifactStateTaskExecuter.execute(ResolveTaskArtifactStateTaskExecuter.java:94)
        at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:56)
        at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:55)
        at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchExceptionTaskExecuter.java:36)
        at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.executeTask(EventFiringTaskExecuter.java:67)
        at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call(EventFiringTaskExecuter.java:52)
        at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call(EventFiringTaskExecuter.java:49)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:315)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:305)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:175)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:101)
        at org.gradle.internal.operations.DelegatingBuildOperationExecutor.call(DelegatingBuildOperationExecutor.java:36)
        at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter.execute(EventFiringTaskExecuter.java:49)
        at org.gradle.execution.plan.LocalTaskNodeExecutor.execute(LocalTaskNodeExecutor.java:43)
        at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute(DefaultTaskExecutionGraph.java:355)
        at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute(DefaultTaskExecutionGraph.java:343)
        at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.execute(DefaultTaskExecutionGraph.java:336)
        at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.execute(DefaultTaskExecutionGraph.java:322)
        at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker$1.execute(DefaultPlanExecutor.java:134)
        at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker$1.execute(DefaultPlanExecutor.java:129)
        at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.execute(DefaultPlanExecutor.java:202)
        at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.executeNextNode(DefaultPlanExecutor.java:193)
        at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.run(DefaultPlanExecutor.java:129)
        at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63)
        at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46)
        at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55)
Caused by: java.lang.NullPointerException
        at com.android.tools.r8.graph.GraphLense.mapDexEncodedMethod(GraphLense.java:111)
        at com.android.tools.r8.ir.desugar.InterfaceMethodDesugaringLense.mapDexEncodedMethod(InterfaceMethodDesugaringLense.java:38)
        at com.android.tools.r8.ir.optimize.Outliner.selectMethodsForOutlining(Outliner.java:868)
        at com.android.tools.r8.ir.conversion.IRConverter.optimize(IRConverter.java:522)
        at com.android.tools.r8.R8.run(R8.java:398)
        at com.android.tools.r8.R8.run(R8.java:229)
        at com.android.tools.r8.R8.lambda$runForTesting$1(R8.java:220)
        at com.android.tools.r8.utils.ExceptionUtils.withCompilationHandler(ExceptionUtils.java:60)
        at com.android.tools.r8.utils.ExceptionUtils.withR8CompilationHandler(ExceptionUtils.java:48)
        at com.android.tools.r8.R8.runForTesting(R8.java:216)
        at com.android.tools.r8.R8.run(R8.java:129)
        at com.android.builder.dexing.R8Tool.runR8(r8Tool.kt:184)
        at com.android.build.gradle.internal.transforms.R8Transform.transform(R8Transform.kt:244)
        at com.android.build.gradle.internal.pipeline.TransformTask$2.call(TransformTask.java:239)
        at com.android.build.gradle.internal.pipeline.TransformTask$2.call(TransformTask.java:235)
        at com.android.builder.profile.ThreadRecorder.record(ThreadRecorder.java:102)
        at com.android.build.gradle.internal.pipeline.TransformTask.transform(TransformTask.java:230)
        at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:73)
        at org.gradle.api.internal.project.taskfactory.IncrementalTaskAction.doExecute(IncrementalTaskAction.java:47)
        at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:41)
        at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:28)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$2.run(ExecuteActionsTaskExecuter.java:284)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:301)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:293)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:175)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:91)
        at org.gradle.internal.operations.DelegatingBuildOperationExecutor.run(DelegatingBuildOperationExecutor.java:31)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction(ExecuteActionsTaskExecuter.java:273)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:258)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.access$200(ExecuteActionsTaskExecuter.java:67)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$TaskExecution.execute(ExecuteActionsTaskExecuter.java:145)
        at org.gradle.internal.execution.impl.steps.ExecuteStep.execute(ExecuteStep.java:49)
        at org.gradle.internal.execution.impl.steps.CancelExecutionStep.execute(CancelExecutionStep.java:34)
        at org.gradle.internal.execution.impl.steps.TimeoutStep.executeWithoutTimeout(TimeoutStep.java:69)
        at org.gradle.internal.execution.impl.steps.TimeoutStep.execute(TimeoutStep.java:49)
        at org.gradle.internal.execution.impl.steps.CatchExceptionStep.execute(CatchExceptionStep.java:33)
        at org.gradle.internal.execution.impl.steps.CreateOutputsStep.execute(CreateOutputsStep.java:50)
        at org.gradle.internal.execution.impl.steps.SnapshotOutputStep.execute(SnapshotOutputStep.java:43)
        at org.gradle.internal.execution.impl.steps.SnapshotOutputStep.execute(SnapshotOutputStep.java:29)
        at org.gradle.internal.execution.impl.steps.CacheStep.executeWithoutCache(CacheStep.java:134)
        at org.gradle.internal.execution.impl.steps.CacheStep.lambda$execute$3(CacheStep.java:83)
        at org.gradle.internal.execution.impl.steps.CacheStep.execute(CacheStep.java:82)
        at org.gradle.internal.execution.impl.steps.CacheStep.execute(CacheStep.java:36)
        at org.gradle.internal.execution.impl.steps.PrepareCachingStep.execute(PrepareCachingStep.java:33)
        at org.gradle.internal.execution.impl.steps.StoreSnapshotsStep.execute(StoreSnapshotsStep.java:38)
        at org.gradle.internal.execution.impl.steps.StoreSnapshotsStep.execute(StoreSnapshotsStep.java:23)
        at org.gradle.internal.execution.impl.steps.SkipUpToDateStep.executeBecause(SkipUpToDateStep.java:96)
        at org.gradle.internal.execution.impl.steps.SkipUpToDateStep.lambda$execute$0(SkipUpToDateStep.java:89)
        at org.gradle.internal.execution.impl.steps.SkipUpToDateStep.execute(SkipUpToDateStep.java:52)
        at org.gradle.internal.execution.impl.steps.SkipUpToDateStep.execute(SkipUpToDateStep.java:36)
        at org.gradle.internal.execution.impl.DefaultWorkExecutor.execute(DefaultWorkExecutor.java:34)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:91)
        ... 33 more


* Get more help at https://help.gradle.org

Deprecated Gradle features were used in this build, making it incompatible with Gradle 6.0.
Use '--warning-mode all' to show the individual deprecation warnings.
See https://docs.gradle.org/5.1.1/userguide/command_line_interface.html#sec:command_line_warnings

BUILD FAILED in 1m 17s
294 actionable tasks: 108 executed, 184 from cache, 2 up-to-date
➜  android git:(dev-android)

[JakeWharton]

File a bug on R8? Not sure what a library is supposed to be doing here.

[tasomaniac]

Will do. Since it happens only for OkHttp I thought It must be something to do with the new version. Can it be related to the fact that the new version support lollipop+? Our app is also minSdkVersion 21

[JakeWharton]

That would be for the R8 team to diagnose because it's their tool that's failing to ingest the code.

[tasomaniac]

Of course 👍 Feel free to close if you don't like it.

I just wanted to open it here too for 2 reasons:

• there may be a quicker solution to fix it on OkHttp's side
• to document in case other fellow developers are hit with the same problem.

[JakeWharton]

Feel free to link the R8 issue so we can track. And link this issue on
their bug report as they frequently chime in on the original library as to
what the problem was.

On Mon, Feb 11, 2019 at 10:06 AM Said Tahsin Dane [e-mail]
wrote:

Of course 👍 Feel free to close if you don't like it.

I just wanted to open it here too for 2 reasons:

• there may be a quicker solution to fix it on OkHttp's side
• to document in case other fellow developers are hit with the same
  problem.

—
You are receiving this because you commented.

Reply to this email directly, view it on GitHub
https://github.com/square/okhttp/issues/4604#issuecomment-462360659, or mute
the thread
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.

[JayNewstrom]

Have you tried this with the latest alpha? I noticed the same thing and tried with 3.5.0 alpha and it was fixed there for me.

[ychescale9]

AGP 3.4.0-beta03 also works.

[XiangliJiaxing]

AGPBI: {"kind":"error","text":"Static interface methods are only supported starting with Android N (--min-api 24): okhttp3.Request okhttp3.Authenticator.lambda$static$0(okhttp3.Rou
te, okhttp3.Response)","sources":[{}],"tool":"D8"}

[JakeWharton]

@XiangliJiaxing that is unrelated. You need to turn on Java 8. See https://developer.android.com/studio/write/java8-support

[ygnessin]

@tasomaniac If you've opened an issue with the R8 team on this, could you please link it here? I am encountering this exact same issue and would love to star and track your issue in google's issue tracker as well.

If you haven't opened one up yet, please let me know because I'd like to open one myself.

Thanks!

[ygnessin]

A small note that might be helpful: I tried generating an APK with okhttp 3.12.1 and okio 1.17.3 and it worked, which confirms the issue is with an interaction between R8 and okhttp, rather than with R8 and okio.

[ygnessin]

I have yet another update: I tried upgrading R8 from 1.3.54 to 1.4.39 and then the build worked! Unfortunately this also caused my app to have a runtime crash, but that might not have anything to do with this issue and be specific to my app.

Here is how you explicitly set a version of R8:

    repositories {
        maven {
            url 'http://storage.googleapis.com/r8-releases/raw'
        }
        maven {
            url 'https://kotlin.bintray.com/kotlinx/'
        }
    }
    dependencies {
        // Must be before the Gradle Plugin for Android.
        classpath 'com.android.tools:r8:1.4.39'

        // https://developer.android.com/studio/releases/gradle-plugin.html
        classpath 'com.android.tools.build:gradle:3.3.1'
    }

[JakeWharton]

You only need the repository for pre-release builds. Numbered versions are on the Google repo.

[tasomaniac]

@ygnessin I haven't find time to open the issue on R8 yet. I tried with 1.3.52 will also try with 54 today and report back.

[ygnessin]

@tasomaniac I was on 1.3.54 when I encountered this, so no need for you to try :) same error occurs. I'll open a google issue in a bit and link it here.

[ygnessin]

I've filed an issue with google for this, here it is: https://issuetracker.google.com/issues/124457717

Please help out by starring it. Thanks!

[sgjesse]

@ygnessin Thank you for filing that bug on the R8 issue tracker.

We should continue the discussion there, as this is most likely not an okhttp issue. However, I will continue here with this comment as well:

From the stack trace it looks like a duplicate of https://issuetracker.google.com/issues/124064876, which also does not reproduce with a recent version of R8 (merged to the 1.4 branch in 1.4.27). This also fits well with the fact that okhttp 1.13 starts using Java 8 features. However since @ygnessin also report that there are runtime crashes there might be more to this.

@ygnessin What is the runtime crash that you see after upgrading?

@tasomaniac and @ygnessin It would be great to have a reproduction for this particular case, so if you are able to share one of the projects where the upgrade cause issues that would be very helpful. You can do it privately with [email protected] if that is a better option.

[sgjesse]

The issue has now been fixed in R8, and there was actually two issues:

1) The NullPointerException from R8 (which was fixed in 1.4.27)
2) The runtime crach mentioned in https://github.com/square/okhttp/issues/4604#issuecomment-463474862 (which was a VerificationError)

They are both fixed in 1.4.57, and that version can be used as described in https://github.com/square/okhttp/issues/4604#issuecomment-463474862.

For more information see https://issuetracker.google.com/issues/124457717.

[swankjesse]

Here’s the fix from Google:

Yuval, this should now be fixed, and with version 1.4.57 of R8 I can build and run you project with okhttp 3.13.1.

If you want to update to okhttp 3.13.1, you can enable R8 1.4.57 by making the following additions to you root build.gradle file:

buildscript {
    ...
    repositories {
        ...
        maven {
            url 'http://storage.googleapis.com/r8-releases/raw'
        }
    }

    dependencies {
        classpath 'com.android.tools:r8:1.4.57'  // Must be before the Gradle Plugin for Android.
        classpath 'com.android.tools.build:gradle:3.3.1'  // You don't need to upgrade this to use a newer R8 version.
        ...
     }
}

We aim at getting this into Android Studio 3.4.0-rc01, which is scheduled for release in about a week.

[tasomaniac]

Looks like this was included in 3.4.0-rc01 🎉

[Hospes]

And this broken again with r8 1.5.20-dev in new android studio 3.5.alpha

[sgjesse]

Andrew,

Can you provide some additional information on the failure with r8 1.5.20-dev? Stack trace from build and/or runtime.

[Hospes]

Hi there, sorry for delay, was pretty busy these days.
I'm using Android Studio 3.5 Canaray 13
Here is console output

> Task :app:transformClassesAndResourcesWithR8ForRelease
R8 is a new Android code shrinker. If you experience any issues, please file a bug at
https://issuetracker.google.com, using 'Shrinker (R8)' as component name. You can
disable R8 by updating gradle.properties with 'android.enableR8=false'.
Current version is: 1.5.20-dev (build a85ccd499f6d149322870a8aedddc92152071a01 from go/r8bot (luci-r8-ci-xenial-11-e43k)).

R8: Missing class: com.google.android.gms.vision.Detector$Processor

/Users/hospes/.gradle/caches/transforms-2/files-2.1/eb1d986bbfd181a4fa15438735dba3a6/jars/classes.jar: R8: Type `libcore.io.Memory` was not found, it is required for default or static interface methods desugaring of `void com.google.android.gms.internal.measurement.zzhw$zza.zza(long, byte)`
/Users/hospes/.gradle/caches/modules-2/files-2.1/com.squareup.okhttp3/okhttp/3.14.1/67612a22d4b8f33c55263b188bf5a72774d06d18/okhttp-3.14.1.jar: R8: Type `org.conscrypt.Conscrypt` was not found, it is required for default or static interface methods desugaring of `void okhttp3.internal.platform.ConscryptPlatform.configureSslSocketFactory(javax.net.ssl.SSLSocketFactory)`
R8: synthesized for lambda desugaring: Type `okhttp3.Dns$-CC` was not found, it is required for default or static interface methods desugaring of `java.util.List okhttp3.-$$Lambda$Dns$mTkNcZf2K4euny3_jks6Cac6Az0.lookup(java.lang.String)`
R8: synthesized for lambda desugaring: Type `okhttp3.logging.HttpLoggingInterceptor$Logger$-CC` was not found, it is required for default or static interface methods desugaring of `void okhttp3.logging.-$$Lambda$HttpLoggingInterceptor$Logger$smmbr_QNvGsDM4WCreZZz8uMHLQ.log(java.lang.String)`
R8: synthesized for lambda desugaring: Type `okhttp3.Authenticator$-CC` was not found, it is required for default or static interface methods desugaring of `okhttp3.Request okhttp3.-$$Lambda$Authenticator$xBBU2iHkJpDKH0vhaB2vteUyEoc.authenticate(okhttp3.Route, okhttp3.Response)`

> Task :app:transformClassesAndResourcesWithR8ForRelease FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:transformClassesAndResourcesWithR8ForRelease'.
> java.lang.NullPointerException (no error message)

And here is stack trace for it:

org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':app:transformClassesAndResourcesWithR8ForRelease'.
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$3.accept(ExecuteActionsTaskExecuter.java:151)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$3.accept(ExecuteActionsTaskExecuter.java:148)
        at org.gradle.internal.Try$Failure.ifSuccessfulOrElse(Try.java:191)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:141)
        at org.gradle.api.internal.tasks.execution.ResolveBeforeExecutionStateTaskExecuter.execute(ResolveBeforeExecutionStateTaskExecuter.java:75)
        at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:62)
        at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:108)
        at org.gradle.api.internal.tasks.execution.ResolveBeforeExecutionOutputsTaskExecuter.execute(ResolveBeforeExecutionOutputsTaskExecuter.java:67)
        at org.gradle.api.internal.tasks.execution.StartSnapshotTaskInputsBuildOperationTaskExecuter.execute(StartSnapshotTaskInputsBuildOperationTaskExecuter.java:62)
        at org.gradle.api.internal.tasks.execution.ResolveAfterPreviousExecutionStateTaskExecuter.execute(ResolveAfterPreviousExecutionStateTaskExecuter.java:46)
        at org.gradle.api.internal.tasks.execution.CleanupStaleOutputsExecuter.execute(CleanupStaleOutputsExecuter.java:94)
        at org.gradle.api.internal.tasks.execution.FinalizePropertiesTaskExecuter.execute(FinalizePropertiesTaskExecuter.java:46)
        at org.gradle.api.internal.tasks.execution.ResolveTaskExecutionModeExecuter.execute(ResolveTaskExecutionModeExecuter.java:95)
        at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:57)
        at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:56)
        at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchExceptionTaskExecuter.java:36)
        at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.executeTask(EventFiringTaskExecuter.java:73)
        at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call(EventFiringTaskExecuter.java:52)
        at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call(EventFiringTaskExecuter.java:49)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:416)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:406)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor$1.execute(DefaultBuildOperationExecutor.java:165)
        ... (cutted to be more shorter)

Caused by: java.lang.NullPointerException
        at com.android.tools.r8.naming.ClassNameMinifier.a(:81)
        at com.android.tools.r8.naming.ClassNameMinifier.a(:25)
        at com.android.tools.r8.naming.ClassNameMinifier.a(:2)
        at com.android.tools.r8.naming.Minifier.run(:15)
        at com.android.tools.r8.R8.a(:493)
        at com.android.tools.r8.R8.c(:1)
        at com.android.tools.r8.R8.b(:1)
        at com.android.tools.r8.utils.t.a(:23)
        at com.android.tools.r8.R8.runForTesting(:3)
        at com.android.tools.r8.R8.run(:3)
        at com.android.builder.dexing.R8Tool.runR8(r8Tool.kt:195)
        at com.android.build.gradle.internal.transforms.R8Transform.transform(R8Transform.kt:261)
        at com.android.build.gradle.internal.pipeline.TransformTask$2.call(TransformTask.java:239)
        at com.android.build.gradle.internal.pipeline.TransformTask$2.call(TransformTask.java:235)
        at com.android.builder.profile.ThreadRecorder.record(ThreadRecorder.java:106)
        at com.android.build.gradle.internal.pipeline.TransformTask.transform(TransformTask.java:230)
        at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:103)
        ... (cutted to be more shorter)

[sgjesse]

This looks like the same as R8 issue 131210377. If you have the time could you try the [additional logging with a custom R8 version] (https://issuetracker.google.com/131210377#comment6), to pinpoint the actual class(es) causing this, as it might not be OkHttp, but some other dependency possibly compiled with Java 6 (class file version 50), were the EnclosingMethod attribute is not present.

[vegeta2102]

Still have problem with Gradle 3.4 and Okhttp 3.13.1

D8: synthesized for lambda desugaring: Type `okhttp3.Authenticator$-CC` was not found, it is required for default or static interface methods desugaring of `okhttp3.Request okhttp3.-$$Lambda$Authenticator$xBBU2iHkJpDKH0vhaB2vteUyEoc.authenticate(okhttp3.Route, okhttp3.Response)`
D8: synthesized for lambda desugaring: Type `okhttp3.Dns$-CC` was not found, it is required for default or static interface methods desugaring of `java.util.List okhttp3.-$$Lambda$Dns$mTkNcZf2K4euny3_jks6Cac6Az0.lookup(java.lang.String)`
D8: synthesized for lambda desugaring: Type `okhttp3.logging.HttpLoggingInterceptor$Logger$-CC` was not found, it is required for default or static interface methods desugaring of `void okhttp3.logging.-$$Lambda$HttpLoggingInterceptor$Logger$smmbr_QNvGsDM4WCreZZz8uMHLQ.log(java.lang.String)`

Source code build OK but app crash when call any api via network.
This looks like the okhttp problem !

[mwolfe38]

I'm having this issue with okhttp 3.14.1 with gradle 5.1.1 (all stable releases, no beta/alphas).
android gradle 3.4.0

error:

AGPBI: {"kind":"error","text":"Static interface methods are only supported starting with Android N (--min-api 24): java.util.List okhttp3.Dns.lambda$static$0(java.lang.String)","sources":[{}],"tool":"D8"}
> Task :axon-view:transformClassesWithDexBuilderForStandardDebug
com.android.builder.dexing.DexArchiveBuilderException: com.android.builder.dexing.DexArchiveBuilderException: Failed to process /Users/mwolfe/.gradle/caches/transforms-2/files-2.1/4ddf64d7ed28e4af7265f85f04e77b12/jars/classes.jar
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    at java.util.concurrent.ForkJoinTask.getThrowableException(ForkJoinTask.java:593)
    at java.util.concurrent.ForkJoinTask.reportException(ForkJoinTask.java:677)
    at java.util.concurrent.ForkJoinTask.join(ForkJoinTask.java:720)
    at com.android.ide.common.internal.WaitableExecutor.waitForTasksWithQuickFail(WaitableExecutor.java:149)
    at com.android.build.gradle.internal.transforms.DexArchiveBuilderTransform.transform(DexArchiveBuilderTransform.java:420)
    at com.android.build.gradle.internal.pipeline.TransformTask$2.call(TransformTask.java:239)
    at com.android.build.gradle.internal.pipeline.TransformTask$2.call(TransformTask.java:235)
    at com.android.builder.profile.ThreadRecorder.record(ThreadRecorder.java:102)
    at com.android.build.gradle.internal.pipeline.TransformTask.transform(TransformTask.java:230)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:73)
    at org.gradle.api.internal.project.taskfactory.IncrementalTaskAction.doExecute(IncrementalTaskAction.java:47)
    at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:41)
    at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:28)
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$2.run(ExecuteActionsTaskExecuter.java:284)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:301)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:293)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:175)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:91)
    at org.gradle.internal.operations.DelegatingBuildOperationExecutor.run(DelegatingBuildOperationExecutor.java:31)
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction(ExecuteActionsTaskExecuter.java:273)
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:258)
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.access$200(ExecuteActionsTaskExecuter.java:67)
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$TaskExecution.execute(ExecuteActionsTaskExecuter.java:145)
    at org.gradle.internal.execution.impl.steps.ExecuteStep.execute(ExecuteStep.java:49)
    at org.gradle.internal.execution.impl.steps.CancelExecutionStep.execute(CancelExecutionStep.java:34)
    at org.gradle.internal.execution.impl.steps.TimeoutStep.executeWithoutTimeout(TimeoutStep.java:69)
    at org.gradle.internal.execution.impl.steps.TimeoutStep.execute(TimeoutStep.java:49)
    at org.gradle.internal.execution.impl.steps.CatchExceptionStep.execute(CatchExceptionStep.java:33)
    at org.gradle.internal.execution.impl.steps.CreateOutputsStep.execute(CreateOutputsStep.java:50)
    at org.gradle.internal.execution.impl.steps.SnapshotOutputStep.execute(SnapshotOutputStep.java:43)
    at org.gradle.internal.execution.impl.steps.SnapshotOutputStep.execute(SnapshotOutputStep.java:29)
    at org.gradle.internal.execution.impl.steps.CacheStep.executeWithoutCache(CacheStep.java:134)
    at org.gradle.internal.execution.impl.steps.CacheStep.lambda$execute$3(CacheStep.java:83)
    at java.util.Optional.orElseGet(Optional.java:267)
    at org.gradle.internal.execution.impl.steps.CacheStep.execute(CacheStep.java:82)
    at org.gradle.internal.execution.impl.steps.CacheStep.execute(CacheStep.java:36)
    at org.gradle.internal.execution.impl.steps.PrepareCachingStep.execute(PrepareCachingStep.java:33)
    at org.gradle.internal.execution.impl.steps.StoreSnapshotsStep.execute(StoreSnapshotsStep.java:38)
    at org.gradle.internal.execution.impl.steps.StoreSnapshotsStep.execute(StoreSnapshotsStep.java:23)
    at org.gradle.internal.execution.impl.steps.SkipUpToDateStep.executeBecause(SkipUpToDateStep.java:96)
    at org.gradle.internal.execution.impl.steps.SkipUpToDateStep.lambda$execute$0(SkipUpToDateStep.java:89)
    at java.util.Optional.map(Optional.java:215)
    at org.gradle.internal.execution.impl.steps.SkipUpToDateStep.execute(SkipUpToDateStep.java:52)
    at org.gradle.internal.execution.impl.steps.SkipUpToDateStep.execute(SkipUpToDateStep.java:36)
    at org.gradle.internal.execution.impl.DefaultWorkExecutor.execute(DefaultWorkExecutor.java:34)
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:91)
    at org.gradle.api.internal.tasks.execution.ResolveTaskOutputCachingStateExecuter.execute(ResolveTaskOutputCachingStateExecuter.java:91)
    at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:57)
    at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:119)
    at org.gradle.api.internal.tasks.execution.ResolvePreviousStateExecuter.execute(ResolvePreviousStateExecuter.java:43)
    at org.gradle.api.internal.tasks.execution.CleanupStaleOutputsExecuter.execute(CleanupStaleOutputsExecuter.java:93)
    at org.gradle.api.internal.tasks.execution.FinalizePropertiesTaskExecuter.execute(FinalizePropertiesTaskExecuter.java:45)
    at org.gradle.api.internal.tasks.execution.ResolveTaskArtifactStateTaskExecuter.execute(ResolveTaskArtifactStateTaskExecuter.java:94)
    at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:56)
    at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:55)
    at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchExceptionTaskExecuter.java:36)
    at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.executeTask(EventFiringTaskExecuter.java:67)
    at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call(EventFiringTaskExecuter.java:52)
    at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call(EventFiringTaskExecuter.java:49)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:315)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:305)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:175)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:101)
    at org.gradle.internal.operations.DelegatingBuildOperationExecutor.call(DelegatingBuildOperationExecutor.java:36)
    at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter.execute(EventFiringTaskExecuter.java:49)
    at org.gradle.execution.plan.LocalTaskNodeExecutor.execute(LocalTaskNodeExecutor.java:43)
    at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute(DefaultTaskExecutionGraph.java:355)
    at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute(DefaultTaskExecutionGraph.java:343)
    at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.execute(DefaultTaskExecutionGraph.java:336)
    at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.execute(DefaultTaskExecutionGraph.java:322)
    at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker$1.execute(DefaultPlanExecutor.java:134)
    at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker$1.execute(DefaultPlanExecutor.java:129)
    at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.execute(DefaultPlanExecutor.java:202)
    at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.executeNextNode(DefaultPlanExecutor.java:193)
    at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.run(DefaultPlanExecutor.java:129)
    at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63)
    at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55)
    at java.lang.Thread.run(Thread.java:745)
    at com.android.build.gradle.internal.transforms.DexArchiveBuilderTransform.launchProcessing(DexArchiveBuilderTransform.java:909)
    at com.android.build.gradle.internal.transforms.DexArchiveBuilderTransform.lambda$convertToDexArchive$6(DexArchiveBuilderTransform.java:834)
    at java.util.concurrent.ForkJoinTask$AdaptedCallable.exec(ForkJoinTask.java:1424)
    at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
    at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)
    at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692)
    at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)
The dependency contains Java 8 bytecode. Please enable desugaring by adding the following to build.gradle
android {
    compileOptions {
        sourceCompatibility 1.8
        targetCompatibility 1.8
    }
}
See https://developer.android.com/studio/write/java8-support.html for details. Alternatively, increase the minSdkVersion to 26 or above.
    at com.android.builder.dexing.D8DexArchiveBuilder.getExceptionToRethrow(D8DexArchiveBuilder.java:124)
    at com.android.builder.dexing.D8DexArchiveBuilder.convert(D8DexArchiveBuilder.java:101)
    at com.android.build.gradle.internal.transforms.DexArchiveBuilderTransform.launchProcessing(DexArchiveBuilderTransform.java:904)
    ... 6 more
    at com.android.tools.r8.utils.ExceptionUtils.withCompilationHandler(ExceptionUtils.java:81)
    at com.android.tools.r8.utils.ExceptionUtils.withD8CompilationHandler(ExceptionUtils.java:45)
    at com.android.tools.r8.D8.run(D8.java:94)
    at com.android.builder.dexing.D8DexArchiveBuilder.convert(D8DexArchiveBuilder.java:99)
    ... 7 more
    at com.android.tools.r8.utils.Reporter.failIfPendingErrors(Reporter.java:101)
    at com.android.tools.r8.utils.Reporter.fatalError(Reporter.java:72)
    at com.android.tools.r8.utils.ExceptionUtils.withCompilationHandler(ExceptionUtils.java:66)
    ... 10 more
> Task :axon-view:transformClassesWithDexBuilderForStandardDebug FAILED
> Task :axon-view:buildInfoGeneratorStandardDebug
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':axon-view:transformClassesWithDexBuilderForStandardDebug'.
> com.android.build.api.transform.TransformException: com.android.builder.dexing.DexArchiveBuilderException: com.android.builder.dexing.DexArchiveBuilderException: Failed to process /Users/mwolfe/.gradle/caches/transforms-2/files-2.1/4ddf64d7ed28e4af7265f85f04e77b12/jars/classes.jar

[takeharu]

I encountered the same error, but I fixed it with the following version.

buildscript {
    repositories {
        maven { url 'https://dl.bintray.com/kotlin/kotlinx/' }
    }
    dependencies {
        classpath 'org.jetbrains.kotlinx:kotlinx-metadata-jvm:0.0.5.1'
        classpath 'com.android.tools:r8:1.4.93'
        classpath 'com.android.tools.build:gradle:3.5.0-beta01'
    }
}

[sgjesse]

There has been a number of reports (e.g. https://issuetracker.google.com/129738209) where the error "Static interface methods are only supported starting with Android N (--min-api 24)" is produced when Instant Run is used.

@mwolfe38 Can you comment on if that is the case for you as well?

[mwolfe38]

@sgjesse yes, disabling instant run fixed it for me. It would be nice to have instant run working again though.

[sgjesse]

Following the issue duplication chain this ends at https://issuetracker.google.com/129362492, which should be fixed in Android Studio 3.4.1. Not exactly sure which 3.5 beta has the fix.