Observe exceptions when opening a file which is not on the classpath

[jdneo]

Java Model Exception: Java Model Status [_/test [in wrong-packagename_dff3ba2f] is not on its project's build path]
at org.eclipse.jdt.internal.core.JavaElement.newJavaModelException(JavaElement.java:583)
at org.eclipse.jdt.internal.core.Openable.generateInfos(Openable.java:254)
at org.eclipse.jdt.internal.core.JavaElement.openWhenClosed(JavaElement.java:596)
at org.eclipse.jdt.internal.core.JavaElement.getElementInfo(JavaElement.java:326)
at org.eclipse.jdt.internal.core.JavaElement.getElementInfo(JavaElement.java:312)
at org.eclipse.jdt.internal.core.PackageFragmentRoot.getKind(PackageFragmentRoot.java:530)
at com.microsoft.jdtls.ext.core.model.PackageNode.createNodeForPackageFragmentRoot(PackageNode.java:215)
at com.microsoft.jdtls.ext.core.PackageCommand.resolvePath(PackageCommand.java:141)
at com.microsoft.jdtls.ext.core.CommandHandler.executeCommand(CommandHandler.java:33)
at org.eclipse.jdt.ls.core.internal.handlers.WorkspaceExecuteCommandHandler$1.run(WorkspaceExecuteCommandHandler.java:215)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
at org.eclipse.jdt.ls.core.internal.handlers.WorkspaceExecuteCommandHandler.executeCommand(WorkspaceExecuteCommandHandler.java:205)
at org.eclipse.jdt.ls.core.internal.handlers.JDTLanguageServer.lambda$3(JDTLanguageServer.java:502)
at org.eclipse.jdt.ls.core.internal.BaseJDTLanguageServer.lambda$0(BaseJDTLanguageServer.java:75)
at java.base/java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:642)
at java.base/java.util.concurrent.CompletableFuture$Completion.exec(CompletableFuture.java:479)
at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290)
at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1020)
at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1656)
at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1594)
at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:183)