FULL PRODUCT VERSION :
java version "1.7.0-ea"
Java(TM) SE Runtime Environment (build 1.7.0-ea-b130)
Java HotSpot(TM) Server VM (build 21.0-b02, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
Linux jglick-laptop 2.6.32-28-generic-pae #55-Ubuntu SMP Mon Jan 10 22:34:08 UTC 2011 i686 GNU/Linux

A DESCRIPTION OF THE PROBLEM :
Running a Maven build of Glassfish sources fails using JDK 7.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Check out Glassfish trunk sources:

https://svn.dev.java.net/svn/glassfish-svn/trunk/v3@43060

Using Maven 3.0.3-RC1, do some setup:

mvn -Prelease-phase1 -DskipTests=true install

Now run:

mvn -N validate

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
On JDK 6, the last step can give a normal error from Maven "Could not find artifact...". But no stack traces are printed.
ACTUAL -
On JDK 7, I see several stack traces which prevent the build from running:

java.lang.NullPointerException
at java.util.Hashtable.remove(Hashtable.java:474)
at sun.security.util.ManifestEntryVerifier.verify(ManifestEntryVerifier.java:226)


ERROR MESSAGES/STACK TRACES THAT OCCUR :
[INFO] Scanning for projects...
Feb 28, 2011 12:55:53 PM com.google.inject.internal.MessageProcessor visit
INFO: An exception was caught and reported. Message: java.lang.NullPointerException
java.lang.NullPointerException
at java.util.Hashtable.remove(Hashtable.java:474)
at sun.security.util.ManifestEntryVerifier.verify(ManifestEntryVerifier.java:226)
at java.util.jar.JarVerifier.processEntry(JarVerifier.java:217)
at java.util.jar.JarVerifier.update(JarVerifier.java:204)
at java.util.jar.JarVerifier$VerifierStream.read(JarVerifier.java:425)
at java.io.FilterInputStream.read(FilterInputStream.java:133)
at java.util.jar.Manifest$FastInputStream.fill(Manifest.java:439)
at java.util.jar.Manifest$FastInputStream.readLine(Manifest.java:375)
at java.util.jar.Manifest$FastInputStream.readLine(Manifest.java:407)
at java.util.jar.Attributes.read(Attributes.java:376)
at java.util.jar.Manifest.read(Manifest.java:251)
at java.util.jar.Manifest.<init>(Manifest.java:69)
at org.sonatype.guice.bean.reflect.URLClassSpace.getClassPathEntries(URLClassSpace.java:293)
at org.sonatype.guice.bean.reflect.URLClassSpace.expandClassPath(URLClassSpace.java:225)
at org.sonatype.guice.bean.reflect.URLClassSpace.getClassPath(URLClassSpace.java:186)
at org.sonatype.guice.bean.reflect.URLClassSpace.findEntries(URLClassSpace.java:128)
at org.sonatype.guice.plexus.scanners.PlexusXmlScanner.scan(PlexusXmlScanner.java:94)
at org.sonatype.guice.plexus.binders.PlexusXmlBeanModule.configure(PlexusXmlBeanModule.java:91)
at org.sonatype.guice.plexus.binders.PlexusBindingModule.configure(PlexusBindingModule.java:66)
at com.google.inject.AbstractModule.configure(AbstractModule.java:59)
at com.google.inject.spi.Elements$RecordingBinder.install(Elements.java:223)
at com.google.inject.spi.Elements.getElements(Elements.java:101)
at com.google.inject.spi.Elements.getElements(Elements.java:78)
at org.sonatype.guice.bean.binders.MergedModule.configure(MergedModule.java:54)
at com.google.inject.spi.Elements$RecordingBinder.install(Elements.java:223)
at com.google.inject.spi.Elements.getElements(Elements.java:101)
at com.google.inject.internal.InjectorShell$Builder.build(InjectorShell.java:132)
at com.google.inject.internal.InternalInjectorCreator.build(InternalInjectorCreator.java:103)
at com.google.inject.Guice.createInjector(Guice.java:95)
at com.google.inject.Guice.createInjector(Guice.java:72)
at com.google.inject.Guice.createInjector(Guice.java:62)
at org.codehaus.plexus.DefaultPlexusContainer.addPlexusInjector(DefaultPlexusContainer.java:450)
at org.codehaus.plexus.DefaultPlexusContainer.discoverComponents(DefaultPlexusContainer.java:430)
at org.apache.maven.project.DefaultProjectBuildingHelper.createProjectRealm(DefaultProjectBuildingHelper.java:269)
at org.apache.maven.project.DefaultModelBuildingListener.buildExtensionsAssembled(DefaultModelBuildingListener.java:106)
at org.apache.maven.model.building.ModelBuildingEventCatapult$1.fire(ModelBuildingEventCatapult.java:43)
at org.apache.maven.model.building.DefaultModelBuilder.fireEvent(DefaultModelBuilder.java:1041)
at org.apache.maven.model.building.DefaultModelBuilder.build(DefaultModelBuilder.java:391)
at org.apache.maven.model.building.DefaultModelBuilder.build(DefaultModelBuilder.java:374)
at org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:536)
at org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:542)
at org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:542)
at org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:328)
at org.apache.maven.DefaultMaven.collectProjects(DefaultMaven.java:632)
at org.apache.maven.DefaultMaven.getProjectsForMavenReactor(DefaultMaven.java:581)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:233)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:613)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)


REPRODUCIBILITY :
This bug can be reproduced always.