Unexpected errors produced when "javac" support enabled with Lombok

1. os:win11
2. jdk:openjdk24
3. project jdk:openjdk21
4. build with gradle

workspace setting

{ "java.import.gradle.home": "D:\\Applications\\Scoop\\apps\\gradle\\current\\", "java.import.gradle.java.home": "D:\\Applications\\Scoop\\apps\\openjdk21\\current", "java.configuration.updateBuildConfiguration": "interactive", "gradle.allowParallelRun": true, "java.compile.nullAnalysis.mode": "automatic", "java.jdt.ls.javac.enabled": "on", "java.completion.engine": "dom", "java.jdt.ls.vmargs": "-Xmx2G --enable-preview", "java.project.encoding": "setDefault", "java.jdt.ls.lombokSupport.enabled": false }
work good in self class

but not work in other class

build.gradle

plugins {
    `java-library`
    `maven-publish`
    id("io.freefair.lombok") version "8.14"
}


group = "com.j.c"
version = "0.0.1-SNAPSHOT"
description = "gradle-test"



allprojects{

    if (project.name == "gradle-platform") return@allprojects

    repositories {
        maven ( url="https://maven.aliyun.com/repository/public" )
        maven ( url="https://repo.maven.apache.org/maven2" )
        maven ( url="https://repo.spring.io/libs-snapshot" )
        maven ( url="https://repo.spring.io/libs-milestone" )
        mavenLocal()
        mavenCentral()
    }
    apply(plugin = "java-library")
    apply(plugin = "io.freefair.lombok")
    java.sourceCompatibility = JavaVersion.VERSION_21
    java.targetCompatibility = JavaVersion.VERSION_21


    tasks.withType<JavaCompile>() {
        options.encoding = "UTF-8"
        options.compilerArgs.add("--enable-preview")
    }

    tasks.withType<Javadoc>() {
        options.encoding = "UTF-8"
    }

}

publishing {
    publications.create<MavenPublication>("maven") {
        from(components["java"])
        }
}

errorlog

[Error - 4:57:53 PM] Jul 13, 2025, 4:57:53 PM Error in calling delegate command handler
gradle-platform does not exist
Java Model Exception: Error in Java Model (code 969): gradle-platform does not exist
at org.eclipse.jdt.internal.core.JavaElement.newNotPresentException(JavaElement.java:548)
at org.eclipse.jdt.internal.core.JavaModelManager.getPerProjectInfoCheckExistence(JavaModelManager.java:2549)
at org.eclipse.jdt.internal.core.JavaProject.getPerProjectInfo(JavaProject.java:2361)
at org.eclipse.jdt.internal.core.JavaProject.getResolvedClasspath(JavaProject.java:2434)
at org.eclipse.jdt.internal.core.JavaProject.getAllPackageFragmentRoots(JavaProject.java:1806)
at org.eclipse.jdt.internal.core.JavaProject.getAllPackageFragmentRoots(JavaProject.java:1797)
at com.microsoft.jdtls.ext.core.ProjectCommand.getMainClasses(ProjectCommand.java:243)
at com.microsoft.jdtls.ext.core.CommandHandler.executeCommand(CommandHandler.java:35)
at org.eclipse.jdt.ls.core.internal.handlers.WorkspaceExecuteCommandHandler$1.run(WorkspaceExecuteCommandHandler.java:230)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:47)
at org.eclipse.jdt.ls.core.internal.handlers.WorkspaceExecuteCommandHandler.executeCommand(WorkspaceExecuteCommandHandler.java:220)
at org.eclipse.jdt.ls.core.internal.handlers.JDTLanguageServer.lambda$4(JDTLanguageServer.java:616)
at org.eclipse.jdt.ls.core.internal.BaseJDTLanguageServer.lambda$0(BaseJDTLanguageServer.java:87)
at java.base/java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:692)
at java.base/java.util.concurrent.CompletableFuture$Completion.exec(CompletableFuture.java:529)
at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:507)
at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1394)
at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1970)
at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:187)

Jul 13, 2025 4:57:53 PM org.eclipse.lsp4j.jsonrpc.RemoteEndpoint fallbackResponseError
����: Internal error: java.lang.NullPointerException: Cannot invoke "org.eclipse.jdt.core.IMethod.getCompilationUnit()" because "iMethod" is null
java.util.concurrent.CompletionException: java.lang.NullPointerException: Cannot invoke "org.eclipse.jdt.core.IMethod.getCompilationUnit()" because "iMethod" is null
at java.base/java.util.concurrent.CompletableFuture.wrapInCompletionException(CompletableFuture.java:325)
at java.base/java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:361)
at java.base/java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:366)
at java.base/java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:695)
at java.base/java.util.concurrent.CompletableFuture$Completion.exec(CompletableFuture.java:529)
at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:507)
at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1394)
at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1970)
at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:187)
Caused by: java.lang.NullPointerException: Cannot invoke "org.eclipse.jdt.core.IMethod.getCompilationUnit()" because "iMethod" is null
at org.eclipse.jdt.internal.corext.refactoring.code.makestatic.InitialConditionsChecker.checkSourceAvailable(InitialConditionsChecker.java:181)
at org.eclipse.jdt.internal.corext.refactoring.code.MakeStaticRefactoring.checkInitialConditions(MakeStaticRefactoring.java:127)
at org.eclipse.jdt.ls.core.internal.corrections.RefactorProcessor.getMakeMethodStaticRefactoringProposal(RefactorProcessor.java:1189)
at org.eclipse.jdt.ls.core.internal.corrections.RefactorProcessor.getProposals(RefactorProcessor.java:228)
at org.eclipse.jdt.ls.core.internal.handlers.CodeActionHandler.getCodeActionCommands(CodeActionHandler.java:221)
at org.eclipse.jdt.ls.core.internal.handlers.JDTLanguageServer.lambda$15(JDTLanguageServer.java:775)
at org.eclipse.jdt.ls.core.internal.BaseJDTLanguageServer.lambda$0(BaseJDTLanguageServer.java:87)
at java.base/java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:692)
... 5 more

[Error - 4:57:53 PM] Request textDocument/codeAction failed.
Message: Internal error.
Code: -32603
java.util.concurrent.CompletionException: java.lang.NullPointerException: Cannot invoke "org.eclipse.jdt.core.IMethod.getCompilationUnit()" because "iMethod" is null
at java.base/java.util.concurrent.CompletableFuture.wrapInCompletionException(CompletableFuture.java:325)
at java.base/java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:361)
at java.base/java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:366)
at java.base/java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:695)
at java.base/java.util.concurrent.CompletableFuture$Completion.exec(CompletableFuture.java:529)
at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:507)
at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1394)
at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1970)
at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:187)
Caused by: java.lang.NullPointerException: Cannot invoke "org.eclipse.jdt.core.IMethod.getCompilationUnit()" because "iMethod" is null
at org.eclipse.jdt.internal.corext.refactoring.code.makestatic.InitialConditionsChecker.checkSourceAvailable(InitialConditionsChecker.java:181)
at org.eclipse.jdt.internal.corext.refactoring.code.MakeStaticRefactoring.checkInitialConditions(MakeStaticRefactoring.java:127)
at org.eclipse.jdt.ls.core.internal.corrections.RefactorProcessor.getMakeMethodStaticRefactoringProposal(RefactorProcessor.java:1189)
at org.eclipse.jdt.ls.core.internal.corrections.RefactorProcessor.getProposals(RefactorProcessor.java:228)
at org.eclipse.jdt.ls.core.internal.handlers.CodeActionHandler.getCodeActionCommands(CodeActionHandler.java:221)
at org.eclipse.jdt.ls.core.internal.handlers.JDTLanguageServer.lambda$15(JDTLanguageServer.java:775)
at org.eclipse.jdt.ls.core.internal.BaseJDTLanguageServer.lambda$0(BaseJDTLanguageServer.java:87)
at java.base/java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:692)
... 5 more

提供された build.gradle とワークスペース設定を使用して、JDK 24、プロジェクト JDK 21、Gradle、Lombok、および javac サポートを有効にした Windows 11 のケースを再現します。ProjectCommand.getMainClasses と、CodeActionHandler、RefactorProcessor、MakeStaticRefactoring を通る code-action パスから開始し、欠落している gradle-platform プロジェクトによってこれらのエラーが発生する理由を特定します。報告された code action がログに記録された失敗を生成しなくなれば完了です。