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

Reproduce the Windows 11 case with JDK 24, project JDK 21, Gradle, Lombok, and javac support enabled, using the supplied build.gradle and workspace settings. Start with ProjectCommand.getMainClasses and the code-action path through CodeActionHandler, RefactorProcessor, and MakeStaticRefactoring; determine why the missing gradle-platform project leads to these errors. Done means the reported code actions no longer produce the logged failures.