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

Tái hiện trường hợp Windows 11 với JDK 24, JDK 21 của project, Gradle, Lombok và hỗ trợ javac được bật, bằng cách sử dụng build.gradle và các thiết lập workspace được cung cấp. Bắt đầu với ProjectCommand.getMainClasses và đường đi của code-action qua CodeActionHandler, RefactorProcessor và MakeStaticRefactoring; xác định tại sao project gradle-platform bị thiếu lại dẫn đến các lỗi này. Hoàn tất khi các code action được báo cáo không còn tạo ra các lỗi đã được ghi lại.