gradle-retrolambda: Retrolambda breaks lint

Related to #69, but figured I’d open a more general issue for discussion and the hope that someone has come up with a creative solution to this.

As of right now, the version of Lombok used by the linter doesn’t support lambdas, which causes it to fall over during linting (example output below). This is a dealbreaker for many, as lint is an important tool for catching issues and can also double back as a data generator for scripting tools (like removing unused resources).

An ideal solution would probably be a recompiled version of the linter with an updated Lombok dependency that supports Java 8.

A possible alternative could be adding a rule to somehow skip LambdaExpression nodes in the AST during processing, though I think this would come at the expense of knowing anything inside the lambda.

Example output of the exception encountered:

Failed converting ECJ parse tree to Lombok for file someclass.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.visitConstructorDeclaration(EcjTreeConverter.java:1194)
    at lombok.ast.ecj.EcjTreeVisitor.visitEcjNode(EcjTreeVisitor.java:252)
    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 org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:45)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:108)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116)
    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$1.callCurrent(Unknown Source)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:49)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:133)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:149)
    at com.android.build.gradle.tasks.Lint.lintSingleVariant(Lint.groovy:173)
    at com.android.build.gradle.tasks.Lint$lintSingleVariant$0.callCurrent(Unknown Source)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:49)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:133)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:145)
    at com.android.build.gradle.tasks.Lint.lint(Lint.groovy:75)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:63)
    at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$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.launcher.cli.ExecuteBuildAction.run(ExecuteBuildAction.java:33)
    at org.gradle.launcher.cli.ExecuteBuildAction.run(ExecuteBuildAction.java:24)
    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)