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

本文出自: https://tianshimanbu.com/more/Uninitialized-object-exists-on-backward-branch-70.html

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• Configuration 'compile' is obsolete and has been replaced with 'implementation'.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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