Does anyone understand why this Tycho packaging step is failing?
[INFO] o.h.m.e.h.MavenExecutionResultHandler - [1] org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.eclipse.tycho.extras:tycho-pack200b-plugin:0.22.0:pack (pack200-pack) on project org.eclipse.orion.server.search: Execution pack200-pack of goal org.eclipse.tycho.extras:tycho-pack200b-plugin:0.22.0:pack failed.
[DEBUG] Closing connection to remote
[ERROR] Failed to execute goal org.eclipse.tycho.extras:tycho-pack200b-plugin:0.22.0:pack (pack200-pack) on project org.eclipse.orion.server.search: Execution pack200-pack of goal org.eclipse.tycho.extras:tycho-pack200b-plugin:0.22.0:pack failed. NullPointerException -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.eclipse.tycho.extras:tycho-pack200b-plugin:0.22.0:pack (pack200-pack) on project org.eclipse.orion.server.search: Execution pack200-pack of goal org.eclipse.tycho.extras:tycho-pack200b-plugin:0.22.0:pack failed.
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:225)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:320)
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:94)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:55)
at java.lang.reflect.Method.invoke(Method.java:619)
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)
Caused by: org.apache.maven.plugin.PluginExecutionException: Execution pack200-pack of goal org.eclipse.tycho.extras:tycho-pack200b-plugin:0.22.0:pack failed.
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:110)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
... 19 more
Caused by: java.lang.NullPointerException
at com.sun.java.util.jar.pack.Package$File.readFrom(Package.java:867)
at com.sun.java.util.jar.pack.PackerImpl$DoPack.readFile(PackerImpl.java:556)