Module imports fail in a module-info.java file

[Clayton Walker]

I tried adding a module import to the top of a module file and got a
compilation error.

import module org.jspecify;

@NullMarked
module org.example.mymodule {
    requires org.jspecify;
}

With the error

An exception has occurred in the compiler (23-ea). Please file a bug
against the Java compiler via the Java bug reporting page (
https://bugreport.java.com) after checking the Bug Database (
https://bugs.java.com) for duplicates. Include your program, the following
diagnostic, and the parameters passed to the Java compiler in your report.
Thank you.
java.lang.AssertionError
at jdk.compiler/com.sun.tools.javac.util.Assert.error(Assert.java:155)
at
jdk.compiler/com.sun.tools.javac.tree.TreeScanner.visitTree(TreeScanner.java:415)
at
jdk.compiler/com.sun.tools.javac.tree.JCTree$Visitor.visitModuleImport(JCTree.java:3528)
at
jdk.compiler/com.sun.tools.javac.tree.JCTree$JCModuleImport.accept(JCTree.java:720)
at
jdk.compiler/com.sun.tools.javac.tree.TreeInfo$DeclScanner.scan(TreeInfo.java:833)
at
jdk.compiler/com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:58)
at
jdk.compiler/com.sun.tools.javac.tree.TreeScanner.visitTopLevel(TreeScanner.java:67)
at
jdk.compiler/com.sun.tools.javac.tree.TreeInfo$DeclScanner.visitTopLevel(TreeInfo.java:837)
at
jdk.compiler/com.sun.tools.javac.tree.JCTree$JCCompilationUnit.accept(JCTree.java:553)
at
jdk.compiler/com.sun.tools.javac.tree.TreeInfo.declarationFor(TreeInfo.java:883)
at
jdk.compiler/com.sun.tools.javac.comp.Annotate.lambda$annotateLater$1(Annotate.java:279)
at jdk.compiler/com.sun.tools.javac.comp.Annotate.flush(Annotate.java:200)
at
jdk.compiler/com.sun.tools.javac.comp.Annotate.unblockAnnotations(Annotate.java:144)
at
jdk.compiler/com.sun.tools.javac.comp.Annotate.enterDone(Annotate.java:157)
at
jdk.compiler/com.sun.tools.javac.main.JavaCompiler.enterDone(JavaCompiler.java:1813)
at
jdk.compiler/com.sun.tools.javac.main.JavaCompiler.enterTrees(JavaCompiler.java:1079)
at
jdk.compiler/com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:948)
at
jdk.compiler/com.sun.tools.javac.api.JavacTaskImpl.lambda$doCall$0(JavacTaskImpl.java:104)
at
jdk.compiler/com.sun.tools.javac.api.JavacTaskImpl.invocationHelper(JavacTaskImpl.java:152)
at
jdk.compiler/com.sun.tools.javac.api.JavacTaskImpl.doCall(JavacTaskImpl.java:100)
at
jdk.compiler/com.sun.tools.javac.api.JavacTaskImpl.call(JavacTaskImpl.java:94)
at
org.gradle.internal.compiler.java.IncrementalCompileTask.call(IncrementalCompileTask.java:92)
at
org.gradle.api.internal.tasks.compile.AnnotationProcessingCompileTask.call(AnnotationProcessingCompileTask.java:94)
at
org.gradle.api.internal.tasks.compile.ResourceCleaningCompilationTask.call(ResourceCleaningCompilationTask.java:57)
at
org.gradle.api.internal.tasks.compile.JdkJavaCompiler.execute(JdkJavaCompiler.java:59)
at
org.gradle.api.internal.tasks.compile.JdkJavaCompiler.execute(JdkJavaCompiler.java:41)
at
org.gradle.api.internal.tasks.compile.daemon.AbstractIsolatedCompilerWorkerExecutor$CompilerWorkAction.execute(AbstractIsolatedCompilerWorkerExecutor.java:78)
at
org.gradle.workers.internal.DefaultWorkerServer.execute(DefaultWorkerServer.java:63)
at
org.gradle.workers.internal.AbstractClassLoaderWorker$1.create(AbstractClassLoaderWorker.java:54)
at
org.gradle.workers.internal.AbstractClassLoaderWorker$1.create(AbstractClassLoaderWorker.java:48)
at
org.gradle.internal.classloader.ClassLoaderUtils.executeInClassloader(ClassLoaderUtils.java:100)
at
org.gradle.workers.internal.AbstractClassLoaderWorker.executeInClassLoader(AbstractClassLoaderWorker.java:48)
at
org.gradle.workers.internal.FlatClassLoaderWorker.run(FlatClassLoaderWorker.java:32)
at
org.gradle.workers.internal.FlatClassLoaderWorker.run(FlatClassLoaderWorker.java:22)
at
org.gradle.workers.internal.WorkerDaemonServer.run(WorkerDaemonServer.java:102)
at
org.gradle.workers.internal.WorkerDaemonServer.run(WorkerDaemonServer.java:71)
at
org.gradle.process.internal.worker.request.WorkerAction$1.call(WorkerAction.java:146)
at
org.gradle.process.internal.worker.child.WorkerLogEventListener.withWorkerLoggingProtocol(WorkerLogEventListener.java:41)
at
org.gradle.process.internal.worker.request.WorkerAction.lambda$run$0(WorkerAction.java:143)
at
org.gradle.internal.operations.CurrentBuildOperationRef.with(CurrentBuildOperationRef.java:80)
at
org.gradle.process.internal.worker.request.WorkerAction.run(WorkerAction.java:135)
at
java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:580)
at
org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36)
at
org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
at
org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:182)
at
org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:164)
at
org.gradle.internal.remote.internal.hub.MessageHub$Handler.run(MessageHub.java:414)
at
org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64)
at
org.gradle.internal.concurrent.AbstractManagedExecutor$1.run(AbstractManagedExecutor.java:47)
at
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
at
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
at java.base/java.lang.Thread.run(Thread.java:1575)

If this is known, please ignore.
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