Okhttp: 4.0.0-alpha02 ProGuard issues

[Albert221]

Yes, I'm using the ProGuard rules from readme.

Warning: okhttp3.internal.platform.ConscryptPlatform$configureTrustManager$1: ca
n't find superclass or interface org.conscrypt.ConscryptHostnameVerifier
Warning: okhttp3.Authenticator$Companion$NONE$1: can't find referenced class okh
ttp3.Authenticator$DefaultImpls
Warning: okhttp3.Authenticator$Companion$NONE$1: can't find referenced class okh
ttp3.Authenticator$DefaultImpls
Warning: okhttp3.CookieJar$Companion$NO_COOKIES$1: can't find referenced class o
khttp3.CookieJar$DefaultImpls
Warning: okhttp3.CookieJar$Companion$NO_COOKIES$1: can't find referenced class o
khttp3.CookieJar$DefaultImpls
Warning: okhttp3.Dns$Companion$SYSTEM$1: can't find referenced class okhttp3.Dns
$DefaultImpls
Warning: okhttp3.Dns$Companion$SYSTEM$1: can't find referenced class okhttp3.Dns
$DefaultImpls
Warning: okhttp3.internal.http2.PushObserver$Companion$CANCEL$1: can't find refe
renced class okhttp3.internal.http2.PushObserver$DefaultImpls
Warning: okhttp3.internal.http2.PushObserver$Companion$CANCEL$1: can't find refe
renced class okhttp3.internal.http2.PushObserver$DefaultImpls
Warning: okhttp3.internal.io.FileSystem$Companion$SYSTEM$1: can't find reference
d class okhttp3.internal.io.FileSystem$DefaultImpls
Warning: okhttp3.internal.io.FileSystem$Companion$SYSTEM$1: can't find reference
d class okhttp3.internal.io.FileSystem$DefaultImpls
Warning: okhttp3.internal.platform.ConscryptPlatform$Companion: can't find refer
enced class org.conscrypt.Conscrypt
Warning: okhttp3.internal.platform.ConscryptPlatform$Companion: can't find refer
enced class org.conscrypt.Conscrypt
Warning: okhttp3.internal.platform.ConscryptPlatform$Companion: can't find refer
enced class org.conscrypt.Conscrypt
Warning: okhttp3.internal.platform.ConscryptPlatform$Companion: can't find refer
enced class org.conscrypt.Conscrypt$Version
Warning: okhttp3.internal.platform.ConscryptPlatform$Companion: can't find refer
enced class org.conscrypt.Conscrypt$Version
Warning: okhttp3.internal.platform.ConscryptPlatform$Companion: can't find refer
enced class org.conscrypt.Conscrypt$Version
Warning: okhttp3.internal.platform.ConscryptPlatform$Companion: can't find refer
enced class org.conscrypt.Conscrypt$Version
Warning: okhttp3.internal.platform.ConscryptPlatform$Companion: can't find refer
enced class org.conscrypt.Conscrypt$Version
Warning: okhttp3.internal.platform.ConscryptPlatform$configureTrustManager$1: ca
n't find referenced class org.conscrypt.ConscryptHostnameVerifier

[laalto]

In our codebase I experimetnally updated 3.14.2 to 4.0.0-RC1. There is -dontwarn okhttp3.** in proguard config so these warnings did not stop the build (can repro if commenting out that rule). However there's another issue later on: proguard gets stuck in its optimization pass 1 forever. Have not yet been able to cook up a MCVE so not filing a separate bug but want to mention under "4.0.0 proguard issues".

[swankjesse]

@laalto oooh, thanks for the heads up. What's your ProGuard version? We saw a similar issue with Okio.
https://github.com/square/okio/issues/516

[swankjesse]

You need ProGuard Version 6.1 or newer, which has the fix for PGD-730.
https://www.guardsquare.com/en/products/proguard/manual/versions

[laalto]

@swankjesse Thanks! Was using ProGuard 6.0.3 coming from Android Gradle plugin 3.4.1. Tried updating it to 6.1.0 with top-level build.gradle:

buildscript {
    configurations.all {
        resolutionStrategy {
            force("net.sf.proguard:proguard-base:6.1.0")
        }
    }
}

This works slightly better; now it proceeds up to optimization pass 2 shrinking phase before proguard crashes with ArrayIndexOutOfBoundsException :(

Maybe this could be the driver to migrate over to R8 in our codebase... will investigate more.

[swankjesse]

@laalto can you share the ArrayIndexOutOfBoundsException stacktrace? Would like to share with the ProGuard team.

[swankjesse]

Documented here: https://github.com/square/okhttp/pull/5176

Closing ’cause there’s no action for OkHttp to take on this. I’d love to see a ProGuard tracking bug for the ArrayIndexOutOfBoundsException issue!

[ZacSweers]

For what it's worth, we saw a similar optimization issue with proguard on 6.1.0-beta2 when I was at Uber that required keeping an Okio ByteString.EMPTY usage in OkHttp where it was null at runtime. I'll try to get someone there to share that rule/usage here for posterity in case others see it.

[ZacSweers]

Specifically, this debugData var

https://github.com/square/okhttp/blob/d1b540fb6973d309f1d70a3ad67b634ea63bc267/okhttp/src/main/java/okhttp3/internal/http2/Http2Reader.kt#L297

would somehow be null by the time it went through

https://github.com/square/okhttp/blob/d1b540fb6973d309f1d70a3ad67b634ea63bc267/okhttp/src/main/java/okhttp3/internal/http2/Http2Reader.kt#L301

and throw an NPE here: https://github.com/square/okhttp/blob/4258c913b30e018e25b21af98ce901cfc4de1c93/okhttp/src/main/java/okhttp3/internal/http2/Http2Connection.kt#L725

Though that was with Java OkHttp, so it'd be a generic NPE. With Kotlin it'd at least nullcheck with descriptive parameter names hopefully, but depends on if proguard strips the intrinsics during optimization

[laalto]

@swankjesse here's a snippet out of gradle assemble --debug --stacktrace

14:07:24.284 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':app:ndhmfi:transformClassesAndResourcesWithProguardForAlpha'.
14:07:24.284 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$3.accept(ExecuteActionsTaskExecuter.java:151)
14:07:24.284 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$3.accept(ExecuteActionsTaskExecuter.java:148)
14:07:24.284 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.Try$Failure.ifSuccessfulOrElse(Try.java:191)
14:07:24.284 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:141)
14:07:24.284 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.api.internal.tasks.execution.ResolveBeforeExecutionStateTaskExecuter.execute(ResolveBeforeExecutionStateTaskExecuter.java:75)
14:07:24.284 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:62)
14:07:24.284 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:108)
14:07:24.284 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.api.internal.tasks.execution.ResolveBeforeExecutionOutputsTaskExecuter.execute(ResolveBeforeExecutionOutputsTaskExecuter.java:67)
14:07:24.284 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.api.internal.tasks.execution.ResolveAfterPreviousExecutionStateTaskExecuter.execute(ResolveAfterPreviousExecutionStateTaskExecuter.java:46)
14:07:24.284 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.api.internal.tasks.execution.CleanupStaleOutputsExecuter.execute(CleanupStaleOutputsExecuter.java:94)
14:07:24.284 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.api.internal.tasks.execution.FinalizePropertiesTaskExecuter.execute(FinalizePropertiesTaskExecuter.java:46)
14:07:24.284 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.api.internal.tasks.execution.ResolveTaskExecutionModeExecuter.execute(ResolveTaskExecutionModeExecuter.java:95)
14:07:24.284 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:57)
14:07:24.284 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:56)
14:07:24.284 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchExceptionTaskExecuter.java:36)
14:07:24.285 [INFO] [org.gradle.api.Project] AAPT2 aapt2-3.4.1-5326820-osx Daemon #5: shutdown
14:07:24.285 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.executeTask(EventFiringTaskExecuter.java:73)
14:07:24.286 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call(EventFiringTaskExecuter.java:52)
14:07:24.286 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call(EventFiringTaskExecuter.java:49)
14:07:24.286 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:416)
14:07:24.286 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:406)
14:07:24.286 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.operations.DefaultBuildOperationExecutor$1.execute(DefaultBuildOperationExecutor.java:165)
14:07:24.286 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:250)
14:07:24.286 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:158)
14:07:24.286 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:102)
14:07:24.286 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.operations.DelegatingBuildOperationExecutor.call(DelegatingBuildOperationExecutor.java:36)
14:07:24.286 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter.execute(EventFiringTaskExecuter.java:49)
14:07:24.287 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.execution.plan.LocalTaskNodeExecutor.execute(LocalTaskNodeExecutor.java:43)
14:07:24.287 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute(DefaultTaskExecutionGraph.java:355)
14:07:24.287 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute(DefaultTaskExecutionGraph.java:343)
14:07:24.287 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.execute(DefaultTaskExecutionGraph.java:336)
14:07:24.287 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.execute(DefaultTaskExecutionGraph.java:322)
14:07:24.287 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker$1.execute(DefaultPlanExecutor.java:134)
14:07:24.287 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker$1.execute(DefaultPlanExecutor.java:129)
14:07:24.287 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.execute(DefaultPlanExecutor.java:202)
14:07:24.287 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.executeNextNode(DefaultPlanExecutor.java:193)
14:07:24.287 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.run(DefaultPlanExecutor.java:129)
14:07:24.287 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63)
14:07:24.287 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46)
14:07:24.287 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55)
14:07:24.287 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] Caused by: java.lang.RuntimeException: java.io.IOException: java.lang.ArrayIndexOutOfBoundsException: 2
14:07:24.287 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at com.android.builder.profile.Recorder$Block.handleException(Recorder.java:55)
14:07:24.287 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at com.android.builder.profile.ThreadRecorder.record(ThreadRecorder.java:104)
14:07:24.287 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at com.android.build.gradle.internal.pipeline.TransformTask.transform(TransformTask.java:230)
14:07:24.287 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:103)
14:07:24.288 [INFO] [org.gradle.api.Project] AAPT2 aapt2-3.4.1-5326820-osx Daemon #6: shutdown
14:07:24.288 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.api.internal.project.taskfactory.IncrementalTaskInputsTaskAction.doExecute(IncrementalTaskInputsTaskAction.java:46)
14:07:24.289 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:41)
14:07:24.289 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.api.internal.project.taskfactory.AbstractIncrementalTaskAction.execute(AbstractIncrementalTaskAction.java:25)
14:07:24.289 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:28)
14:07:24.289 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$5.run(ExecuteActionsTaskExecuter.java:404)
14:07:24.289 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:402)
14:07:24.289 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:394)
14:07:24.289 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.operations.DefaultBuildOperationExecutor$1.execute(DefaultBuildOperationExecutor.java:165)
14:07:24.289 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:250)
14:07:24.289 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:158)
14:07:24.289 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.operations.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:92)
14:07:24.289 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.operations.DelegatingBuildOperationExecutor.run(DelegatingBuildOperationExecutor.java:31)
14:07:24.289 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction(ExecuteActionsTaskExecuter.java:393)
14:07:24.289 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:376)
14:07:24.289 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.access$200(ExecuteActionsTaskExecuter.java:80)
14:07:24.289 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$TaskExecution.execute(ExecuteActionsTaskExecuter.java:213)
14:07:24.290 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.execution.steps.ExecuteStep.lambda$execute$0(ExecuteStep.java:32)
14:07:24.290 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.execution.steps.ExecuteStep.execute(ExecuteStep.java:32)
14:07:24.290 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.execution.steps.ExecuteStep.execute(ExecuteStep.java:26)
14:07:24.290 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.execution.steps.CleanupOutputsStep.execute(CleanupOutputsStep.java:58)
14:07:24.290 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.execution.steps.CleanupOutputsStep.execute(CleanupOutputsStep.java:35)
14:07:24.290 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.execution.steps.ResolveInputChangesStep.execute(ResolveInputChangesStep.java:48)
14:07:24.290 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.execution.steps.ResolveInputChangesStep.execute(ResolveInputChangesStep.java:33)
14:07:24.290 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.execution.steps.CancelExecutionStep.execute(CancelExecutionStep.java:39)
14:07:24.291 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.execution.steps.TimeoutStep.executeWithoutTimeout(TimeoutStep.java:73)
14:07:24.291 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.execution.steps.TimeoutStep.execute(TimeoutStep.java:54)
14:07:24.291 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.execution.steps.CatchExceptionStep.execute(CatchExceptionStep.java:35)
14:07:24.291 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.execution.steps.CreateOutputsStep.execute(CreateOutputsStep.java:51)
14:07:24.291 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.execution.steps.SnapshotOutputsStep.execute(SnapshotOutputsStep.java:45)
14:07:24.291 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.execution.steps.SnapshotOutputsStep.execute(SnapshotOutputsStep.java:31)
14:07:24.291 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.execution.steps.CacheStep.executeWithoutCache(CacheStep.java:201)
14:07:24.291 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.execution.steps.CacheStep.execute(CacheStep.java:70)
14:07:24.292 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.execution.steps.CacheStep.execute(CacheStep.java:45)
14:07:24.292 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.execution.steps.BroadcastChangingOutputsStep.execute(BroadcastChangingOutputsStep.java:49)
14:07:24.292 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.execution.steps.StoreSnapshotsStep.execute(StoreSnapshotsStep.java:43)
14:07:24.292 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.execution.steps.StoreSnapshotsStep.execute(StoreSnapshotsStep.java:32)
14:07:24.292 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.execution.steps.RecordOutputsStep.execute(RecordOutputsStep.java:38)
14:07:24.292 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.execution.steps.RecordOutputsStep.execute(RecordOutputsStep.java:24)
14:07:24.292 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.execution.steps.SkipUpToDateStep.executeBecause(SkipUpToDateStep.java:96)
14:07:24.292 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.execution.steps.SkipUpToDateStep.lambda$execute$0(SkipUpToDateStep.java:89)
14:07:24.292 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.execution.steps.SkipUpToDateStep.execute(SkipUpToDateStep.java:54)
14:07:24.292 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.execution.steps.SkipUpToDateStep.execute(SkipUpToDateStep.java:38)
14:07:24.292 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.execution.steps.ResolveChangesStep.execute(ResolveChangesStep.java:77)
14:07:24.292 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.execution.steps.ResolveChangesStep.execute(ResolveChangesStep.java:37)
14:07:24.292 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.execution.steps.legacy.MarkSnapshottingInputsFinishedStep.execute(MarkSnapshottingInputsFinishedStep.java:36)
14:07:24.292 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.execution.steps.legacy.MarkSnapshottingInputsFinishedStep.execute(MarkSnapshottingInputsFinishedStep.java:26)
14:07:24.292 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.execution.steps.ResolveCachingStateStep.execute(ResolveCachingStateStep.java:90)
14:07:24.292 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.execution.steps.ResolveCachingStateStep.execute(ResolveCachingStateStep.java:48)
14:07:24.292 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.internal.execution.impl.DefaultWorkExecutor.execute(DefaultWorkExecutor.java:33)
14:07:24.292 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:120)
14:07:24.292 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   ... 35 more
14:07:24.292 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] Caused by: java.io.IOException: java.lang.ArrayIndexOutOfBoundsException: 2
14:07:24.292 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at com.android.build.gradle.internal.transforms.ProGuardTransform.doMinification(ProGuardTransform.java:264)
14:07:24.293 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at com.android.build.gradle.internal.transforms.ProGuardTransform.lambda$transform$0(ProGuardTransform.java:181)
14:07:24.293 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at com.android.build.gradle.internal.tasks.WorkLimiter.limit(WorkLimiter.kt:38)
14:07:24.293 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at com.android.build.gradle.internal.transforms.ProGuardTransform.transform(ProGuardTransform.java:179)
14:07:24.293 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at com.android.build.gradle.internal.pipeline.TransformTask$2.call(TransformTask.java:239)
14:07:24.293 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at com.android.build.gradle.internal.pipeline.TransformTask$2.call(TransformTask.java:235)
14:07:24.293 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at com.android.builder.profile.ThreadRecorder.record(ThreadRecorder.java:102)
14:07:24.293 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   ... 87 more
14:07:24.293 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] Caused by: java.lang.ArrayIndexOutOfBoundsException: 2
14:07:24.293 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at proguard.shrink.ClassShrinker$MySignatureCleaner.visitSignatureAttribute(ClassShrinker.java:345)
14:07:24.293 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at proguard.classfile.util.SimplifiedVisitor.visitSignatureAttribute(SimplifiedVisitor.java:504)
14:07:24.293 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at proguard.classfile.util.SimplifiedVisitor.visitSignatureAttribute(SimplifiedVisitor.java:516)
14:07:24.293 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at proguard.classfile.attribute.SignatureAttribute.accept(SignatureAttribute.java:109)
14:07:24.293 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at proguard.classfile.ProgramMethod.attributesAccept(ProgramMethod.java:101)
14:07:24.293 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at proguard.classfile.attribute.visitor.AllAttributeVisitor.visitProgramMember(AllAttributeVisitor.java:95)
14:07:24.293 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at proguard.classfile.util.SimplifiedVisitor.visitProgramMethod(SimplifiedVisitor.java:93)
14:07:24.293 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at proguard.classfile.ProgramMethod.accept(ProgramMethod.java:93)
14:07:24.293 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at proguard.classfile.ProgramClass.methodsAccept(ProgramClass.java:588)
14:07:24.293 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at proguard.shrink.ClassShrinker.visitProgramClass(ClassShrinker.java:133)
14:07:24.293 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at proguard.classfile.visitor.MultiClassVisitor.visitProgramClass(MultiClassVisitor.java:67)
14:07:24.293 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at proguard.shrink.UsedClassFilter.visitProgramClass(UsedClassFilter.java:62)
14:07:24.293 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at proguard.classfile.ProgramClass.accept(ProgramClass.java:430)
14:07:24.293 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at proguard.classfile.ClassPool.classesAccept(ClassPool.java:125)
14:07:24.293 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at proguard.shrink.Shrinker.execute(Shrinker.java:158)
14:07:24.293 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at proguard.ProGuard.shrink(ProGuard.java:392)
14:07:24.294 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at proguard.ProGuard.execute(ProGuard.java:178)
14:07:24.294 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at com.android.build.gradle.internal.transforms.BaseProguardAction.runProguard(BaseProguardAction.java:66)
14:07:24.294 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at com.android.build.gradle.internal.transforms.ProGuardTransform.doMinification(ProGuardTransform.java:258)
14:07:24.294 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   ... 93 more

[laalto]

Googling method names in the stacktrace shows a similar crash reported at https://sourceforge.net/p/proguard/bugs/753/

[laalto]

For what it's worth, resolved the proguard issues in our codebase by migrating to R8.

[TWiStErRob]

@swankjesse half of the warnings in OP are likely because https://youtrack.jetbrains.com/issue/KT-33097

[netomi]

The related bug in Proguard (PGD-753) seems to be the same as in this case. We would like to fix this asap but need a reproducible sample.

Could you also possible test if the special gson optimization might be the culprit, adding this will disable it:

-optimizations !library/gson

[netomi]

The problem in proguard seems to be related to parameter removal optimization (can be disabled by adding -optimizations !method/parameter/removal).

We now have a reproducible test case and will fix it asap.

[netomi]

Problem has been identified and fixed in source code. It was related to an incomplete fix for PGD-735. We will try to make a release 6.1.2 asap.

[phicdy]

@netomi We have encountered this problem...you said you will release v6.1.2 asap but it was not released yet. Do you have plan of the release ?

[netomi]

Sorry for the late reply, it has already been fixed in ProGuard and will be included in the next release 6.2.0 hopefully available in the next 2 weeks.

[netomi]

ProGuard 6.2.0 is now released with a fix for this problem.