title: Android Studio - java.io.IOException: Failed to generate v1 signature
body: <p>I get this error after updating my Android Studio to all new versions after 3.0 Canary 4. (I am using v3.0 cause it is much faster and there is no need to jack for Kotlin.)</p>
  
  <p>It looks like there is an issue with build flow that it cannot generate or sign my APK file for both debug and release version.</p>
  
  <p>I also tried deleting my <code>debug.keystore</code>, restarting AndroidStudio and system(!!!) but it didn't solve.</p>
  
  <p>Here is a full Gradle log:</p>
  
  <pre><code>FAILURE: Build failed with an exception.
  
  * What went wrong: Execution failed for task ':chris-app:packageDemoDebug'.
  java.io.IOException: Failed to generate v1 signature
  
  * Try: Run with --info or --debug option to get more log output.
  
  * Exception is: org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':chris-app:packageDemoDebug'.
          at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:100)
          at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:70)
          at org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecuter.execute(SkipUpToDateTaskExecuter.java:64)
          at org.gradle.api.internal.tasks.execution.ResolveTaskOutputCachingStateExecuter.execute(ResolveTaskOutputCachingStateExecuter.java:54)
          at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:58)
          at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:88)
          at org.gradle.api.internal.tasks.execution.ResolveTaskArtifactStateTaskExecuter.execute(ResolveTaskArtifactStateTaskExecuter.java:52)
          at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:52)
          at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:54)
          at org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter.execute(ExecuteAtMostOnceTaskExecuter.java:43)
          at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchExceptionTaskExecuter.java:34)
          at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker$1.run(DefaultTaskGraphExecuter.java:243)
          at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:336)
          at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:328)
          at org.gradle.internal.progress.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:197)
          at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:107)
          at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:236)
          at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:225)
          at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker.processTask(DefaultTaskPlanExecutor.java:124)
          at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker.access$200(DefaultTaskPlanExecutor.java:80)
          at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker$1.execute(DefaultTaskPlanExecutor.java:105)
          at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker$1.execute(DefaultTaskPlanExecutor.java:99)
          at org.gradle.execution.taskgraph.DefaultTaskExecutionPlan.execute(DefaultTaskExecutionPlan.java:625)
          at org.gradle.execution.taskgraph.DefaultTaskExecutionPlan.executeWithTask(DefaultTaskExecutionPlan.java:580)
          at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker.run(DefaultTaskPlanExecutor.java:99)
          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.tooling.BuildException: java.io.IOException: Failed to generate v1 signature
          at com.android.build.gradle.internal.scope.OutputScope.lambda$parallelForEachOutput$10(OutputScope.java:240)
          at com.android.build.gradle.internal.scope.OutputScope.parallelForEachOutput(OutputScope.java:235)
          at com.android.build.gradle.internal.scope.OutputScope.parallelForEachOutput(OutputScope.java:196)
          at com.android.build.gradle.internal.scope.OutputScope.parallelForEachOutput(OutputScope.java:180)
          at com.android.build.gradle.tasks.PackageAndroidArtifact.doFullTaskAction(PackageAndroidArtifact.java:466)
          at com.android.build.gradle.internal.tasks.IncrementalTask.taskAction(IncrementalTask.java:80)
          at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:73)
          at org.gradle.api.internal.project.taskfactory.DefaultTaskClassInfoStore$IncrementalTaskAction.doExecute(DefaultTaskClassInfoStore.java:168)
          at org.gradle.api.internal.project.taskfactory.DefaultTaskClassInfoStore$StandardTaskAction.execute(DefaultTaskClassInfoStore.java:134)
          at org.gradle.api.internal.project.taskfactory.DefaultTaskClassInfoStore$StandardTaskAction.execute(DefaultTaskClassInfoStore.java:121)
          at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$1.run(ExecuteActionsTaskExecuter.java:122)
          at org.gradle.internal.progress.DefaultBuildOperationExecutor$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:197)
          at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:107)
          at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction(ExecuteActionsTaskExecuter.java:111)
          at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:92)
          ... 27 more Caused by: java.lang.RuntimeException: java.io.IOException: Failed to generate v1 signature Caused by: java.io.IOException: Failed to generate v1 signature
          at com.android.apkzlib.sign.SigningExtension.onOutputZipReadyForUpdate(SigningExtension.java:297)
          at com.android.apkzlib.sign.SigningExtension.access$200(SigningExtension.java:55)
          at com.android.apkzlib.sign.SigningExtension$1.lambda$beforeUpdate$2(SigningExtension.java:175)
          at com.android.apkzlib.zip.ZFile.notify(ZFile.java:2099)
          at com.android.apkzlib.zip.ZFile.update(ZFile.java:871)
          at com.android.apkzlib.zip.ZFile.close(ZFile.java:1161)
          at com.android.apkzlib.zfile.ApkZFileCreator.close(ApkZFileCreator.java:172)
          at com.google.common.io.Closer.close(Closer.java:216)
          at com.android.builder.internal.packaging.IncrementalPackager.close(IncrementalPackager.java:332)
          at com.android.build.gradle.tasks.PackageAndroidArtifact.doTask(PackageAndroidArtifact.java:698)
          at com.android.build.gradle.tasks.PackageAndroidArtifact.splitFullAction(PackageAndroidArtifact.java:520)
          at com.android.build.gradle.internal.scope.OutputScope.lambda$parallelForEachOutput$6(OutputScope.java:185)
          at com.android.build.gradle.internal.scope.OutputScope.lambda$parallelForEachOutput$7(OutputScope.java:202)
          at com.android.build.gradle.internal.scope.OutputScope.lambda$null$8(OutputScope.java:224) "
          at com.android.apksig.internal.apk.v1.V1SchemeSigner.checkEntryNameValid(V1SchemeSigner.java:406)
          at com.android.apksig.internal.apk.v1.V1SchemeSigner.generateManifestFile(V1SchemeSigner.java:373)
          at com.android.apksig.internal.apk.v1.V1SchemeSigner.sign(V1SchemeSigner.java:253)
          at com.android.apksig.DefaultApkSignerEngine.outputJarEntries(DefaultApkSignerEngine.java:372)
          at com.android.apkzlib.sign.SigningExtension.onOutputZipReadyForUpdate(SigningExtension.java:295)
          ... 13 more
  
  
  BUILD FAILED in 2m 49s
  </code></pre>