Retrolambda: Lint crashes when using lambda expressions with retrolambda

Question

I'm trying to use retrolambda along with gradle-retrolambda plugin. In general it works fine, but when I compile for release, the lint stage fails with exception:

:playground.dagger:lintVitalReleaseFailed converting ECJ parse tree to Lombok for file D:\....\playground\dagger\MainActivity.java java.lang.UnsupportedOperationException: Unknown ASTNode child: LambdaExpression     at lombok.ast.ecj.EcjTreeVisitor.visitOther(EcjTreeVisitor.java:368)     at lombok.ast.ecj.EcjTreeVisitor.visitEcjNode(EcjTreeVisitor.java:364)     at lombok.ast.ecj.EcjTreeConverter.visit(EcjTreeConverter.java:295)     at lombok.ast.ecj.EcjTreeConverter.toTree(EcjTreeConverter.java:236)     at lombok.ast.ecj.EcjTreeConverter.fillList(EcjTreeConverter.java:282)     at lombok.ast.ecj.EcjTreeConverter.fillList(EcjTreeConverter.java:252)     at lombok.ast.ecj.EcjTreeConverter.access$100(EcjTreeConverter.java:141)     at lombok.ast.ecj.EcjTreeConverter$2.visitMessageSend(EcjTreeConverter.java:1042)     at lombok.ast.ecj.EcjTreeVisitor.visitEcjNode(EcjTreeVisitor.java:156)     at lombok.ast.ecj.EcjTreeConverter.visit(EcjTreeConverter.java:295)     at lombok.ast.ecj.EcjTreeConverter.toTree(EcjTreeConverter.java:236)     at lombok.ast.ecj.EcjTreeConverter.fillList(EcjTreeConverter.java:282)     at lombok.ast.ecj.EcjTreeConverter.fillList(EcjTreeConverter.java:252)     at lombok.ast.ecj.EcjTreeConverter.toBlock(EcjTreeConverter.java:397)     at lombok.ast.ecj.EcjTreeConverter.access$1500(EcjTreeConverter.java:141)     at lombok.ast.ecj.EcjTreeConverter$2.visitMethodDeclaration(EcjTreeConverter.java:1241)     at lombok.ast.ecj.EcjTreeVisitor.visitEcjNode(EcjTreeVisitor.java:152)     at lombok.ast.ecj.EcjTreeConverter.visit(EcjTreeConverter.java:295)     at lombok.ast.ecj.EcjTreeConverter.toTree(EcjTreeConverter.java:236)     at lombok.ast.ecj.EcjTreeConverter.fillList(EcjTreeConverter.java:282)     at lombok.ast.ecj.EcjTreeConverter.fillList(EcjTreeConverter.java:252)     at lombok.ast.ecj.EcjTreeConverter.access$100(EcjTreeConverter.java:141)     at lombok.ast.ecj.EcjTreeConverter$2.createNormalTypeBody(EcjTreeConverter.java:563)     at lombok.ast.ecj.EcjTreeConverter$2.visitTypeDeclaration(EcjTreeConverter.java:486)     at lombok.ast.ecj.EcjTreeVisitor.visitEcjNode(EcjTreeVisitor.java:48)     at lombok.ast.ecj.EcjTreeConverter.visit(EcjTreeConverter.java:295)     at lombok.ast.ecj.EcjTreeConverter.toTree(EcjTreeConverter.java:236)     at lombok.ast.ecj.EcjTreeConverter.fillList(EcjTreeConverter.java:282)     at lombok.ast.ecj.EcjTreeConverter.fillList(EcjTreeConverter.java:252)     at lombok.ast.ecj.EcjTreeConverter.access$100(EcjTreeConverter.java:141)     at lombok.ast.ecj.EcjTreeConverter$2.visitCompilationUnitDeclaration(EcjTreeConverter.java:441)     at lombok.ast.ecj.EcjTreeVisitor.visitEcjNode(EcjTreeVisitor.java:264)     at lombok.ast.ecj.EcjTreeConverter.visit(EcjTreeConverter.java:295)     at com.android.tools.lint.EcjParser.parseJava(EcjParser.java:407)     at com.android.tools.lint.client.api.JavaVisitor.visitFile(JavaVisitor.java:236)     at com.android.tools.lint.client.api.LintDriver.checkJava(LintDriver.java:1491)     at com.android.tools.lint.client.api.LintDriver.runFileDetectors(LintDriver.java:1026)     at com.android.tools.lint.client.api.LintDriver.checkProject(LintDriver.java:882)     at com.android.tools.lint.client.api.LintDriver.analyze(LintDriver.java:433)     at com.android.tools.lint.client.api.LintDriver.analyze(LintDriver.java:374)     at com.android.tools.lint.LintCliClient.run(LintCliClient.java:130)     at com.android.build.gradle.internal.LintGradleClient.run(LintGradleClient.java:112)     at com.android.build.gradle.internal.LintGradleClient$run.call(Unknown Source)     at com.android.build.gradle.tasks.Lint.runLint(Lint.groovy:198)     at com.android.build.gradle.tasks.Lint.this$4$runLint(Lint.groovy)     at com.android.build.gradle.tasks.Lint$this$4$runLint$1.callCurrent(Unknown Source)     at com.android.build.gradle.tasks.Lint.lintSingleVariant(Lint.groovy:173)     at com.android.build.gradle.tasks.Lint$lintSingleVariant$0.callCurrent(Unknown Source)     at com.android.build.gradle.tasks.Lint.lint(Lint.groovy:75)     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)     at java.lang.reflect.Method.invoke(Method.java:483)     at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:63)     at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.doExecute(AnnotationProcessingTaskFactory.java:218)     at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.execute(AnnotationProcessingTaskFactory.java:211)     at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.execute(AnnotationProcessingTaskFactory.java:200)     at org.gradle.api.internal.AbstractTask$TaskActionWrapper.execute(AbstractTask.java:579)     at org.gradle.api.internal.AbstractTask$TaskActionWrapper.execute(AbstractTask.java:562)     at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction(ExecuteActionsTaskExecuter.java:80)     at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:61)     at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:46)     at org.gradle.api.internal.tasks.execution.PostExecutionAnalysisTaskExecuter.execute(PostExecutionAnalysisTaskExecuter.java:35)     at org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecuter.execute(SkipUpToDateTaskExecuter.java:64)     at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:58)     at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:42)     at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:52)     at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:53)     at org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter.execute(ExecuteAtMostOnceTaskExecuter.java:43)     at org.gradle.api.internal.AbstractTask.executeWithoutThrowingTaskFailure(AbstractTask.java:305)     at org.gradle.execution.taskgraph.AbstractTaskPlanExecutor$TaskExecutorWorker.executeTask(AbstractTaskPlanExecutor.java:79)     at org.gradle.execution.taskgraph.AbstractTaskPlanExecutor$TaskExecutorWorker.processTask(AbstractTaskPlanExecutor.java:63)     at org.gradle.execution.taskgraph.AbstractTaskPlanExecutor$TaskExecutorWorker.run(AbstractTaskPlanExecutor.java:51)     at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor.process(DefaultTaskPlanExecutor.java:23)     at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter.execute(DefaultTaskGraphExecuter.java:88)     at org.gradle.execution.SelectedTaskExecutionAction.execute(SelectedTaskExecutionAction.java:29)     at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:62)     at org.gradle.execution.DefaultBuildExecuter.access$200(DefaultBuildExecuter.java:23)     at org.gradle.execution.DefaultBuildExecuter$2.proceed(DefaultBuildExecuter.java:68)     at org.gradle.execution.DryRunBuildExecutionAction.execute(DryRunBuildExecutionAction.java:32)     at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:62)     at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:55)     at org.gradle.initialization.DefaultGradleLauncher.doBuildStages(DefaultGradleLauncher.java:149)     at org.gradle.initialization.DefaultGradleLauncher.doBuild(DefaultGradleLauncher.java:106)     at org.gradle.initialization.DefaultGradleLauncher.run(DefaultGradleLauncher.java:86)     at org.gradle.launcher.exec.InProcessBuildActionExecuter$DefaultBuildController.run(InProcessBuildActionExecuter.java:80)     at org.gradle.tooling.internal.provider.BuildModelAction.run(BuildModelAction.java:43)     at org.gradle.tooling.internal.provider.BuildModelAction.run(BuildModelAction.java:30)     at org.gradle.tooling.internal.provider.ConfiguringBuildAction.run(ConfiguringBuildAction.java:119)     at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:36)     at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:26)     at org.gradle.launcher.daemon.server.exec.ExecuteBuild.doBuild(ExecuteBuild.java:47)     at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:34)     at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:119)     at org.gradle.launcher.daemon.server.exec.WatchForDisconnection.execute(WatchForDisconnection.java:35)     at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:119)     at org.gradle.launcher.daemon.server.exec.ResetDeprecationLogger.execute(ResetDeprecationLogger.java:24)     at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:119)     at org.gradle.launcher.daemon.server.exec.StartStopIfBuildAndStop.execute(StartStopIfBuildAndStop.java:33)     at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:119)     at org.gradle.launcher.daemon.server.exec.ForwardClientInput$2.call(ForwardClientInput.java:71)     at org.gradle.launcher.daemon.server.exec.ForwardClientInput$2.call(ForwardClientInput.java:69)     at org.gradle.util.Swapper.swap(Swapper.java:38)     at org.gradle.launcher.daemon.server.exec.ForwardClientInput.execute(ForwardClientInput.java:69)     at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:119)     at org.gradle.launcher.daemon.server.exec.LogToClient.doBuild(LogToClient.java:60)     at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:34)     at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:119)     at org.gradle.launcher.daemon.server.exec.EstablishBuildEnvironment.doBuild(EstablishBuildEnvironment.java:70)     at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:34)     at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:119)     at org.gradle.launcher.daemon.server.exec.DaemonHygieneAction.execute(DaemonHygieneAction.java:39)     at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:119)     at org.gradle.launcher.daemon.server.exec.StartBuildOrRespondWithBusy$1.run(StartBuildOrRespondWithBusy.java:46)     at org.gradle.launcher.daemon.server.DaemonStateCoordinator$1.run(DaemonStateCoordinator.java:246)     at org.gradle.internal.concurrent.DefaultExecutorFactory$StoppableExecutorImpl$1.run(DefaultExecutorFactory.java:64)     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)     at java.lang.Thread.run(Thread.java:745) 

Is there anything to do about it? Of course, a trivial work/around would be to disable lint check for release. But I'm looking for solution, allowing to keep lint.

Following is app's module build.gradle:

apply plugin: 'com.android.application' apply plugin: 'me.tatarka.retrolambda' apply plugin: 'com.neenbedankt.android-apt'  configurations {     apt }  android {     compileOptions {         sourceCompatibility JavaVersion.VERSION_1_8         targetCompatibility JavaVersion.VERSION_1_8     }      compileSdkVersion 22     buildToolsVersion "21.1.2"      defaultConfig {         minSdkVersion 10         targetSdkVersion 22         versionCode 1         versionName "1.0"     }      buildTypes {         release {             minifyEnabled true             shrinkResources true             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'         }     } }  repositories {     maven{         url 'https://oss.sonatype.org/content/repositories/snapshots/'     } }   dependencies {     compile fileTree(dir: 'libs', include: ['*.jar'])     compile 'com.android.support:appcompat-v7:22.0.0'     compile 'com.jakewharton:butterknife:6.1.0'     compile 'com.google.dagger:dagger:2.0-SNAPSHOT'     compile 'de.greenrobot:eventbus:2.4.0'     retrolambdaConfig 'net.orfjackal.retrolambda:retrolambda:1.8.1'     apt 'com.google.dagger:dagger-compiler:2.0-SNAPSHOT'     provided 'org.glassfish:javax.annotation:10.0-b28' } 

Root build.gradle:

buildscript {     repositories {         jcenter()     }     dependencies {         classpath 'com.android.tools.build:gradle:1.1.0'         classpath 'com.neenbedankt.gradle.plugins:android-apt:1.4'         classpath 'me.tatarka:gradle-retrolambda:2.5.0'     } }  allprojects {     repositories {         jcenter()     } } 

Answer 1

You can use a special lombok version with lint which does not whine about Java 8 features.

buildscript {     repositories {         jcenter()         ...     }      dependencies {         classpath 'com.android.tools.build:gradle:<version>'         classpath 'me.tatarka:gradle-retrolambda:<version>'         classpath 'me.tatarka.retrolambda.projectlombok:lombok.ast:0.2.3.a2'     }      // Exclude the version that the android plugin depends on.     configurations.classpath.exclude group: 'com.android.tools.external.lombok' } 

This way you can keep running lint on the whole project, even with the latest versions of the Android Gradle plugin.

Note: If you receive same errors, try to put the configuration above into the top most build.gradle file. It should work then.