maven 4 fails

[froque]

Apache Maven 4.0.0-alpha-4 (009cf4a7213aead8a7946a2397e2396c5927f30f)
Maven home: /opt/maven/apache-maven-4.0.0-alpha-4
Java version: 18.0.2-ea, vendor: Private Build, runtime: /usr/lib/jvm/java-18-openjdk-amd64
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "5.19.0-43-generic", arch: "amd64", family: "unix"
(...)
[WARNING] Failed to notify spy org.apache.maven.ReactorReader$ReactorReaderSpy: Cannot invoke "java.io.File.toPath()" because the return value of "org.apache.maven.project.MavenProject.getFile()" is null
java.lang.NullPointerException: Cannot invoke "java.io.File.toPath()" because the return value of "org.apache.maven.project.MavenProject.getFile()" is null
    at org.apache.maven.internal.transformation.ConsumerPomArtifactTransformer$ConsumerPomArtifact.lambda$new$0 (ConsumerPomArtifactTransformer.java:137)
    at org.apache.maven.internal.transformation.OnChangeTransformer.mayUpdate (OnChangeTransformer.java:82)
    at org.apache.maven.internal.transformation.OnChangeTransformer.get (OnChangeTransformer.java:72)
    at org.apache.maven.internal.transformation.TransformedArtifact.getFile (TransformedArtifact.java:76)
    at org.apache.maven.RepositoryUtils.toArtifact (RepositoryUtils.java:154)
    at java.util.stream.ReferencePipeline$3$1.accept (ReferencePipeline.java:197)
    at java.util.ArrayList$ArrayListSpliterator.forEachRemaining (ArrayList.java:1625)
    at java.util.stream.Streams$ConcatSpliterator.forEachRemaining (Streams.java:735)
    at java.util.stream.AbstractPipeline.copyInto (AbstractPipeline.java:509)
    at java.util.stream.AbstractPipeline.wrapAndCopyInto (AbstractPipeline.java:499)
    at java.util.stream.ForEachOps$ForEachOp.evaluateSequential (ForEachOps.java:150)
    at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential (ForEachOps.java:173)
    at java.util.stream.AbstractPipeline.evaluate (AbstractPipeline.java:234)
    at java.util.stream.ReferencePipeline.forEach (ReferencePipeline.java:596)
    at org.apache.maven.ReactorReader.installIntoProjectLocalRepository (ReactorReader.java:354)
    at org.apache.maven.ReactorReader.processEvent (ReactorReader.java:331)
    at org.apache.maven.ReactorReader.access$000 (ReactorReader.java:67)
    at org.apache.maven.ReactorReader$ReactorReaderSpy.onEvent (ReactorReader.java:501)
    at org.apache.maven.eventspy.internal.EventSpyDispatcher.onEvent (EventSpyDispatcher.java:84)
    at org.apache.maven.eventspy.internal.EventSpyExecutionListener.projectSucceeded (EventSpyExecutionListener.java:72)
    at org.apache.maven.lifecycle.internal.DefaultExecutionEventCatapult.fire (DefaultExecutionEventCatapult.java:70)
    at org.apache.maven.lifecycle.internal.DefaultExecutionEventCatapult.fire (DefaultExecutionEventCatapult.java:41)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:123)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:80)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:60)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:132)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:313)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:228)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:153)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:859)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:282)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:198)
    at jdk.internal.reflect.DirectMethodHandleAccessor.invoke (DirectMethodHandleAccessor.java:104)
    at java.lang.reflect.Method.invoke (Method.java:577)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:282)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:225)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:406)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347)

[froque]

Seems to be fixed by https://issues.apache.org/jira/browse/MNG-7707 in a future release 4.0.0-alpha-6