Uninitialized object exists on backward branch 70 原因及解决办法

升级Android Stadio 3.1 后的一波三折

前面文章介绍了很多升级Android Stadio 3.1后带来的问题及解决办法：

成功解决org.gradle.api.internal.tasks.compile.CompilationFailedException: Compilation failed;
android stadio 3.1 升级后的坑 - mac升级gradle方法汇总
Android dependency 'com.android.support:multidex' has different version for the compile (1.0.2) and runtime (1.0.3) classpath
Configuration 'compile' is obsolete and has been replaced with 'implementation'. It will be removed at the end of 2018

以上这些文章都是为了解决IDE升级后带来的问题的所有记录，但是就在博主的工程可以run起来以后（即IDE打debug版本直接链接到真机上调试没有发现任何问题），但再打release版本的时候却出现了一个刺手的问题。问题的详情如下：

即：使用IDE直接运行可以起来没有任何问题，但是使用Gradle打Release版本的时候却报错。

FAILURE: Build failed with an exception.

* What went wrong:
A problem occurred configuring project ':app'.
> Could not generate a proxy class for class com.android.build.gradle.tasks.BuildArtifactReportTask.

what？？？！！！以上异常真的是没有一点点防备，没有一点点的犹豫就报了，再没有更多可以寻迹的信息。接下来在Gradle后面加上--stacktrace 来跟踪更多的过程信息：

command-line： gradle build --stacktrace

顺利的在编译控制台中爆出更多信息（文末贴出全部的信息），最有用的当然是以下这一段：

Uninitialized object exists on backward branch 70
Exception Details:
  Location:
    com/android/build/gradle/tasks/BuildArtifactReportTask.newArtifact(Lcom/android/build/api/artifact/BuildableArtifact;)Lcom/android/build/gradle/tasks/BuildArtifactReportTask$BuildableArtifactData; @119: goto
  Reason:
    Error exists in the bytecode
  Bytecode:
    0000000: bb00 f459 2bb9 0139 0100 c000 6b2b b901
    0000010: 3d01 0001 b901 4302 0059 1301 45b8 0148
    0000020: c000 374d 3a0d 3a0c 3a0b 2c4e bb00 6859
    0000030: 2c10 0ab8 003d b700 69c0 006b 3a04 2db9
    0000040: 0054 0100 3a05 1905 b900 5a01 0099 002d
    0000050: 1905 b900 5e01 003a 0619 0419 06c0 014a
    0000060: 3a07 3a0e 1907 b901 4d01 003a 0f19 0e19
    0000070: 0fb9 0075 0200 57a7 ffcf 1904 c000 773a
    0000080: 0e19 0b19 0c19 0d19 0eb7 0150 b0       
  Stackmap Table:
    full_frame(@70,{Object[#2],Object[#109],Object[#55],Object[#55],Object[#107],Object[#86],Top,Top,Top,Top,Top,Uninitialized[#0],Uninitialized[#0],Object[#107]},{})
    same_frame(@122)

分析和解决办法

其实几乎没有什么有效的信息，但是关键字Bytecode表明和JDK有关，这里还在编译阶段，所以应该是引用的JDK的版本有问题。

我升级了一下JDK的版本，仍然不行。通过命令行env查看JAVA_HOME的位置没有看出来错误。

不过，博主依稀记得，Android Stadio 引用的JDK是它内置的，路径在/Applications/Android Studio.app/Contents/jre/jdk/Contents/Home，而系统环境中的JDK路径是：/Library/Java/JavaVirtualMachines/jdk1.8.0_05.jdk/Contents/Home。

显然，二者引用的JDK路径不一样，也就是能够解释为何IDE可以运行起来，而Gradle打版本的时候却报错。

原因：

IDE run起来的时候，引用了Android Stadio 3.1 内置的JDK，路径为：/Applications/Android Studio.app/Contents/jre/jdk/Contents/Home
Gradle build的时候，引用了系统环境的JDK，即JAVA_HOME中定义的/Library/Java/JavaVirtualMachines/jdk1.8.0_05.jdk/Contents/Home

英文描述叫做：system exists different jdk ，IDE depend on inner JDK，gradle depend on env jdk .

解决办法：

知道了原因，解决起来很容易，办法有两个：

1.直接将JAVE_HOME设置为可用的一个，这里可用的是：/Applications/Android Studio.app/Contents/jre/jdk/Contents/Home（我的是mac电脑，具体路径请参考自己电脑上的，Android Stadio->project structure->sdk location ->jdk location）
2.由于考虑到以后系统环境中的JDK升级可用，而第一个办法是临时的解决方式，只要解决在Gradle build的时候ok就可以。所以可以写一个打包脚本，在Gradle build （或者相关打包命令）之前，通过export 指令把JAVE_HOME的值临时改变一下，即可以达到打包的目的，又不会更改系统的JDK路径。脚本示例：

export JAVA_HOME=/Applications/Android\ Studio.app/Contents/jre/jdk/Contents/Home
echo "start gradle....."
gradle clean assembleRelease
echo "gradle end!!!"

至此，Uninitialized object exists on backward branch 70 的原因及解决办法已经给出，希望对各位有帮助。

===============================完整的异常日志==============================

完整异常日志，没有兴趣的可以忽略。

FAILURE: Build failed with an exception.

* What went wrong:
A problem occurred configuring project ':app'.
> Could not generate a proxy class for class com.android.build.gradle.tasks.BuildArtifactReportTask.

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

* Exception is:
org.gradle.api.ProjectConfigurationException: A problem occurred configuring project ':app'.
        at org.gradle.configuration.project.LifecycleProjectEvaluator.addConfigurationFailure(LifecycleProjectEvaluator.java:94)
        at org.gradle.configuration.project.LifecycleProjectEvaluator.notifyAfterEvaluate(LifecycleProjectEvaluator.java:89)
        at org.gradle.configuration.project.LifecycleProjectEvaluator.doConfigure(LifecycleProjectEvaluator.java:70)
        at org.gradle.configuration.project.LifecycleProjectEvaluator.access$100(LifecycleProjectEvaluator.java:34)
        at org.gradle.configuration.project.LifecycleProjectEvaluator$ConfigureProject.run(LifecycleProjectEvaluator.java:110)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:336)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:328)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:199)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:110)
        at org.gradle.configuration.project.LifecycleProjectEvaluator.evaluate(LifecycleProjectEvaluator.java:50)
        at org.gradle.api.internal.project.DefaultProject.evaluate(DefaultProject.java:667)
        at org.gradle.api.internal.project.DefaultProject.evaluate(DefaultProject.java:136)
        at org.gradle.execution.TaskPathProjectEvaluator.configure(TaskPathProjectEvaluator.java:35)
        at org.gradle.execution.TaskPathProjectEvaluator.configureHierarchy(TaskPathProjectEvaluator.java:62)
        at org.gradle.configuration.DefaultBuildConfigurer.configure(DefaultBuildConfigurer.java:38)
        at org.gradle.initialization.DefaultGradleLauncher$ConfigureBuild.run(DefaultGradleLauncher.java:261)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:336)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:328)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:199)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:110)
        at org.gradle.initialization.DefaultGradleLauncher.configureBuild(DefaultGradleLauncher.java:173)
        at org.gradle.initialization.DefaultGradleLauncher.doBuildStages(DefaultGradleLauncher.java:132)
        at org.gradle.initialization.DefaultGradleLauncher.executeTasks(DefaultGradleLauncher.java:115)
        at org.gradle.internal.invocation.GradleBuildController$1.call(GradleBuildController.java:78)
        at org.gradle.internal.invocation.GradleBuildController$1.call(GradleBuildController.java:75)
        at org.gradle.internal.work.DefaultWorkerLeaseService.withLocks(DefaultWorkerLeaseService.java:152)
        at org.gradle.internal.invocation.GradleBuildController.doBuild(GradleBuildController.java:100)
        at org.gradle.internal.invocation.GradleBuildController.run(GradleBuildController.java:75)
        at org.gradle.tooling.internal.provider.ExecuteBuildActionRunner.run(ExecuteBuildActionRunner.java:28)
        at org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35)
        at org.gradle.tooling.internal.provider.ValidatingBuildActionRunner.run(ValidatingBuildActionRunner.java:32)
        at org.gradle.launcher.exec.RunAsBuildOperationBuildActionRunner$1.run(RunAsBuildOperationBuildActionRunner.java:43)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:336)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:328)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:199)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:110)
        at org.gradle.launcher.exec.RunAsBuildOperationBuildActionRunner.run(RunAsBuildOperationBuildActionRunner.java:40)
        at org.gradle.tooling.internal.provider.SubscribableBuildActionRunner.run(SubscribableBuildActionRunner.java:51)
        at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:49)
        at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:32)
        at org.gradle.launcher.exec.BuildTreeScopeBuildActionExecuter.execute(BuildTreeScopeBuildActionExecuter.java:39)
        at org.gradle.launcher.exec.BuildTreeScopeBuildActionExecuter.execute(BuildTreeScopeBuildActionExecuter.java:25)
        at org.gradle.tooling.internal.provider.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:80)
        at org.gradle.tooling.internal.provider.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:53)
        at org.gradle.tooling.internal.provider.ServicesSetupBuildActionExecuter.execute(ServicesSetupBuildActionExecuter.java:57)
        at org.gradle.tooling.internal.provider.ServicesSetupBuildActionExecuter.execute(ServicesSetupBuildActionExecuter.java:32)
        at org.gradle.tooling.internal.provider.GradleThreadBuildActionExecuter.execute(GradleThreadBuildActionExecuter.java:36)
        at org.gradle.tooling.internal.provider.GradleThreadBuildActionExecuter.execute(GradleThreadBuildActionExecuter.java:25)
        at org.gradle.tooling.internal.provider.ParallelismConfigurationBuildActionExecuter.execute(ParallelismConfigurationBuildActionExecuter.java:43)
        at org.gradle.tooling.internal.provider.ParallelismConfigurationBuildActionExecuter.execute(ParallelismConfigurationBuildActionExecuter.java:29)
        at org.gradle.tooling.internal.provider.StartParamsValidatingActionExecuter.execute(StartParamsValidatingActionExecuter.java:64)
        at org.gradle.tooling.internal.provider.StartParamsValidatingActionExecuter.execute(StartParamsValidatingActionExecuter.java:29)
        at org.gradle.tooling.internal.provider.SessionFailureReportingActionExecuter.execute(SessionFailureReportingActionExecuter.java:59)
        at org.gradle.tooling.internal.provider.SessionFailureReportingActionExecuter.execute(SessionFailureReportingActionExecuter.java:44)
        at org.gradle.tooling.internal.provider.SetupLoggingActionExecuter.execute(SetupLoggingActionExecuter.java:45)
        at org.gradle.tooling.internal.provider.SetupLoggingActionExecuter.execute(SetupLoggingActionExecuter.java:30)
        at org.gradle.launcher.daemon.server.exec.ExecuteBuild.doBuild(ExecuteBuild.java:67)
        at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36)
        at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122)
        at org.gradle.launcher.daemon.server.exec.WatchForDisconnection.execute(WatchForDisconnection.java:37)
        at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122)
        at org.gradle.launcher.daemon.server.exec.ResetDeprecationLogger.execute(ResetDeprecationLogger.java:26)
        at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122)
        at org.gradle.launcher.daemon.server.exec.RequestStopIfSingleUsedDaemon.execute(RequestStopIfSingleUsedDaemon.java:34)
        at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122)
        at org.gradle.launcher.daemon.server.exec.ForwardClientInput$2.call(ForwardClientInput.java:74)
        at org.gradle.launcher.daemon.server.exec.ForwardClientInput$2.call(ForwardClientInput.java:72)
        at org.gradle.util.Swapper.swap(Swapper.java:38)
        at org.gradle.launcher.daemon.server.exec.ForwardClientInput.execute(ForwardClientInput.java:72)
        at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122)
        at org.gradle.launcher.daemon.server.exec.LogAndCheckHealth.execute(LogAndCheckHealth.java:55)
        at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122)
        at org.gradle.launcher.daemon.server.exec.LogToClient.doBuild(LogToClient.java:62)
        at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36)
        at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122)
        at org.gradle.launcher.daemon.server.exec.EstablishBuildEnvironment.doBuild(EstablishBuildEnvironment.java:82)
        at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36)
        at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122)
        at org.gradle.launcher.daemon.server.exec.StartBuildOrRespondWithBusy$1.run(StartBuildOrRespondWithBusy.java:50)
        at org.gradle.launcher.daemon.server.DaemonStateCoordinator$1.run(DaemonStateCoordinator.java:295)
        at org.gradle.internal.concurrent.ExecutorPolicy$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: org.gradle.api.GradleException: Could not generate a proxy class for class com.android.build.gradle.tasks.BuildArtifactReportTask.
        at org.gradle.api.internal.AbstractClassGenerator.generateUnderLock(AbstractClassGenerator.java:224)
        at org.gradle.api.internal.AbstractClassGenerator.generate(AbstractClassGenerator.java:80)
        at org.gradle.api.internal.project.taskfactory.TaskFactory.create(TaskFactory.java:113)
        at org.gradle.api.internal.project.taskfactory.TaskFactory.create(TaskFactory.java:40)
        at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory.create(AnnotationProcessingTaskFactory.java:49)
        at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory.create(AnnotationProcessingTaskFactory.java:30)
        at org.gradle.api.internal.tasks.DefaultTaskContainer$TaskInstantiator.create(DefaultTaskContainer.java:304)
        at org.gradle.api.internal.tasks.DefaultTaskContainer$TaskInstantiator.create(DefaultTaskContainer.java:292)
        at org.gradle.api.internal.tasks.DefaultTaskContainer.create(DefaultTaskContainer.java:119)
        at org.gradle.api.internal.tasks.DefaultTaskContainer.create(DefaultTaskContainer.java:150)
        at com.android.build.gradle.internal.TaskFactoryImpl.create(TaskFactoryImpl.kt:50)
        at com.android.build.gradle.internal.ApplicationTaskManager.createTasksForVariantScope(ApplicationTaskManager.java:115)
        at com.android.build.gradle.internal.VariantManager.createTasksForVariantData(VariantManager.java:530)
        at com.android.build.gradle.internal.VariantManager.lambda$createAndroidTasks$1(VariantManager.java:352)
        at com.android.build.gradle.internal.VariantManager$$Lambda$150/436108481.call(Unknown Source)
        at com.android.builder.profile.ThreadRecorder.record(ThreadRecorder.java:81)
        at com.android.build.gradle.internal.VariantManager.createAndroidTasks(VariantManager.java:348)
        at com.android.build.gradle.BasePlugin.lambda$createAndroidTasks$6(BasePlugin.java:749)
        at com.android.build.gradle.BasePlugin$$Lambda$108/828734042.call(Unknown Source)
        at com.android.builder.profile.ThreadRecorder.record(ThreadRecorder.java:81)
        at com.android.build.gradle.BasePlugin.createAndroidTasks(BasePlugin.java:744)
        at com.android.build.gradle.BasePlugin.lambda$null$4(BasePlugin.java:650)
        at com.android.build.gradle.BasePlugin$$Lambda$84/872580635.call(Unknown Source)
        at com.android.builder.profile.ThreadRecorder.record(ThreadRecorder.java:81)
        at com.android.build.gradle.BasePlugin.lambda$createTasks$5(BasePlugin.java:646)
        at com.android.build.gradle.BasePlugin$$Lambda$83/527813523.execute(Unknown Source)
        at org.gradle.internal.event.BroadcastDispatch$ActionInvocationHandler.dispatch(BroadcastDispatch.java:91)
        at org.gradle.internal.event.BroadcastDispatch$ActionInvocationHandler.dispatch(BroadcastDispatch.java:80)
        at org.gradle.internal.event.AbstractBroadcastDispatch.dispatch(AbstractBroadcastDispatch.java:42)
        at org.gradle.internal.event.BroadcastDispatch$SingletonDispatch.dispatch(BroadcastDispatch.java:230)
        at org.gradle.internal.event.BroadcastDispatch$SingletonDispatch.dispatch(BroadcastDispatch.java:149)
        at org.gradle.internal.event.AbstractBroadcastDispatch.dispatch(AbstractBroadcastDispatch.java:58)
        at org.gradle.internal.event.BroadcastDispatch$CompositeDispatch.dispatch(BroadcastDispatch.java:324)
        at org.gradle.internal.event.BroadcastDispatch$CompositeDispatch.dispatch(BroadcastDispatch.java:234)
        at org.gradle.internal.event.ListenerBroadcast.dispatch(ListenerBroadcast.java:140)
        at org.gradle.internal.event.ListenerBroadcast.dispatch(ListenerBroadcast.java:37)
        at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:93)
        at com.sun.proxy.$Proxy24.afterEvaluate(Unknown Source)
        at org.gradle.configuration.project.LifecycleProjectEvaluator.notifyAfterEvaluate(LifecycleProjectEvaluator.java:76)
        ... 81 more
Caused by: java.lang.VerifyError: Uninitialized object exists on backward branch 70
Exception Details:
  Location:
    com/android/build/gradle/tasks/BuildArtifactReportTask.newArtifact(Lcom/android/build/api/artifact/BuildableArtifact;)Lcom/android/build/gradle/tasks/BuildArtifactReportTask$BuildableArtifactData; @119: goto
  Reason:
    Error exists in the bytecode
  Bytecode:
    0000000: bb00 f459 2bb9 0139 0100 c000 6b2b b901
    0000010: 3d01 0001 b901 4302 0059 1301 45b8 0148
    0000020: c000 374d 3a0d 3a0c 3a0b 2c4e bb00 6859
    0000030: 2c10 0ab8 003d b700 69c0 006b 3a04 2db9
    0000040: 0054 0100 3a05 1905 b900 5a01 0099 002d
    0000050: 1905 b900 5e01 003a 0619 0419 06c0 014a
    0000060: 3a07 3a0e 1907 b901 4d01 003a 0f19 0e19
    0000070: 0fb9 0075 0200 57a7 ffcf 1904 c000 773a
    0000080: 0e19 0b19 0c19 0d19 0eb7 0150 b0       
  Stackmap Table:
    full_frame(@70,{Object[#2],Object[#109],Object[#55],Object[#55],Object[#107],Object[#86],Top,Top,Top,Top,Top,Uninitialized[#0],Uninitialized[#0],Object[#107]},{})
    same_frame(@122)

        at org.gradle.internal.reflect.ClassInspector.inspectClass(ClassInspector.java:72)
        at org.gradle.internal.reflect.ClassInspector.visitGraph(ClassInspector.java:56)
        at org.gradle.internal.reflect.ClassInspector.inspect(ClassInspector.java:36)
        at org.gradle.api.internal.AbstractClassGenerator.inspectType(AbstractClassGenerator.java:284)
        at org.gradle.api.internal.AbstractClassGenerator.inspectType(AbstractClassGenerator.java:239)
        at org.gradle.api.internal.AbstractClassGenerator.generateUnderLock(AbstractClassGenerator.java:111)
        ... 119 more


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