Referenced classpath provider does not exist (Buildship)

[steffsommer]

In a Gradle project that includes another gradle build, an error is thrown that the buildship classpath provider does not exist. Happens in my personal config, but is more easily reproducible using LazyVim. LazyVims JDTLS configuration: https://github.com/LazyVim/LazyVim/blob/main/lua/lazyvim/plugins/extras/lang/java.lua.

The error leads to wrong diagnostics being displayed on the imports of the included build. Imports of the included build get the diagnostic error The import <import> cannot be resolved, although going to the definition of the import works fine.

• jdtls : 1.38.0
• Client: Neovim 0.10.1
• java-test: 0.41.1
• java-debug-adapter: 0.58.0

[ERROR][2024-08-23 07:03:24] ...lsp/handlers.lua:623	'Aug 23, 2024, 7:03:24 AM Problems occurred when invoking code from plug-in: "org.eclipse.jdt.ls.core".\nFailed to resolve classpath: Referenced classpath provider does not exist: org.eclipse.buildship.core.classpathprovider
java.lang.Exception: Failed to resolve classpath: Referenced classpath provider does not exist: org.eclipse.buildship.core.classpathprovider
com.microsoft.java.debug.plugin.internal.ResolveClasspathsHandler.resolveClasspaths(ResolveClasspathsHandler.java:79)
com.microsoft.java.debug.plugin.internal.JavaDebugDelegateCommandHandler.executeCommand(JavaDebugDelegateCommandHandler.java:62)
org.eclipse.jdt.ls.core.internal.handlers.WorkspaceExecuteCommandHandler$1.run(WorkspaceExecuteCommandHandler.java:230)
org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:47)
org.eclipse.jdt.ls.core.internal.handlers.WorkspaceExecuteCommandHandler.executeCommand(WorkspaceExecuteCommandHandler.java:220)\n\tat org.eclipse.jdt.ls.core.internal.handlers.JDTLanguageServer.lambda$4(JDTLanguageServer.java:606)
org.eclipse.jdt.ls.core.internal.BaseJDTLanguageServer.lambda$0(BaseJDTLanguageServer.java:87)
java.base/java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:646)
java.base/java.util.concurrent.CompletableFuture$Completion.exec(CompletableFuture.java:483)
java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:373)
java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1182)
java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1655)
java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1622)
java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:165)
Caused by: org.eclipse.core.runtime.CoreException: Referenced classpath provider does not exist: org.eclipse.buildship.core.classpathprovider\n\tat org.eclipse.jdt.launching.JavaRuntime.abort(JavaRuntime.java:1870)\n\tat org.eclipse.jdt.launching.JavaRuntime.abort(JavaRuntime.java:1855)
org.eclipse.jdt.launching.JavaRuntime.getClasspathProvider(JavaRuntime.java:1181)
org.eclipse.jdt.launching.JavaRuntime.computeUnresolvedRuntimeClasspath(JavaRuntime.java:1659)
com.microsoft.java.debug.plugin.internal.ResolveClasspathsHandler.computeClassPath(ResolveClasspathsHandler.java:231)
com.microsoft.java.debug.plugin.internal.ResolveClasspathsHandler.computeClassPath(ResolveClasspathsHandler.java:211)
com.microsoft.java.debug.plugin.internal.ResolveClasspathsHandler.computeClassPath(ResolveClasspathsHandler.java:165)
com.microsoft.java.debug.plugin.internal.ResolveClasspathsHandler.resolveClasspaths(ResolveClasspathsHandler.java:76)
... 13 more\n'