Cannot invoke "org.eclipse.equinox.p2.publisher.eclipse.Feature.setLocation(String)" because "feature" is null

[basilevs]

Following error happens semi-randomly on Tycho 4.0.13 an 5.0.3. Deleting local repository seems to help.
Please add enough debug information (broken artifact path), so that I could find which artifact is needed to reproduce the problem.

[ERROR] Failed to execute goal org.eclipse.tycho:tycho-p2-plugin:5.0.3:p2-metadata-default (default-p2-metadata-default) on project org.eclipse.rcptt.ecl.server: Execution default-p2-metadata-default of goal org.eclipse.tycho:tycho-p2-plugin:5.0.3:p2-metadata-default failed: Cannot invoke "org.eclipse.equinox.p2.publisher.eclipse.Feature.setLocation(String)" because "feature" is null -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.eclipse.tycho:tycho-p2-plugin:5.0.3:p2-metadata-default (default-p2-metadata-default) on project org.eclipse.rcptt.ecl.server: Execution default-p2-metadata-default of goal org.eclipse.tycho:tycho-p2-plugin:5.0.3:p2-metadata-default failed: Cannot invoke "org.eclipse.equinox.p2.publisher.eclipse.Feature.setLocation(String)" because "feature" is null
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute2 (MojoExecutor.java:333)
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute (MojoExecutor.java:316)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:212)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:174)
    at org.apache.maven.lifecycle.internal.MojoExecutor.access$000 (MojoExecutor.java:75)
    at org.apache.maven.lifecycle.internal.MojoExecutor$1.run (MojoExecutor.java:162)
    at org.apache.maven.plugin.DefaultMojosExecutionStrategy.execute (DefaultMojosExecutionStrategy.java:39)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:159)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:105)
    at io.takari.maven.builder.smart.SmartBuilderImpl.buildProject (SmartBuilderImpl.java:206)
    at io.takari.maven.builder.smart.SmartBuilderImpl$ProjectBuildTask.run (SmartBuilderImpl.java:71)
    at java.util.concurrent.Executors$RunnableAdapter.call (Executors.java:545)
    at java.util.concurrent.FutureTask.run (FutureTask.java:328)
    at java.util.concurrent.ThreadPoolExecutor.runWorker (ThreadPoolExecutor.java:1090)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run (ThreadPoolExecutor.java:614)
    at java.lang.Thread.run (Thread.java:1474)
Caused by: org.apache.maven.plugin.PluginExecutionException: Execution default-p2-metadata-default of goal org.eclipse.tycho:tycho-p2-plugin:5.0.3:p2-metadata-default failed: Cannot invoke "org.eclipse.equinox.p2.publisher.eclipse.Feature.setLocation(String)" because "feature" is null
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:133)
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute2 (MojoExecutor.java:328)
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute (MojoExecutor.java:316)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:212)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:174)
    at org.apache.maven.lifecycle.internal.MojoExecutor.access$000 (MojoExecutor.java:75)
    at org.apache.maven.lifecycle.internal.MojoExecutor$1.run (MojoExecutor.java:162)
    at org.apache.maven.plugin.DefaultMojosExecutionStrategy.execute (DefaultMojosExecutionStrategy.java:39)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:159)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:105)
    at io.takari.maven.builder.smart.SmartBuilderImpl.buildProject (SmartBuilderImpl.java:206)
    at io.takari.maven.builder.smart.SmartBuilderImpl$ProjectBuildTask.run (SmartBuilderImpl.java:71)
    at java.util.concurrent.Executors$RunnableAdapter.call (Executors.java:545)
    at java.util.concurrent.FutureTask.run (FutureTask.java:328)
    at java.util.concurrent.ThreadPoolExecutor.runWorker (ThreadPoolExecutor.java:1090)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run (ThreadPoolExecutor.java:614)
    at java.lang.Thread.run (Thread.java:1474)
Caused by: java.lang.NullPointerException: Cannot invoke "org.eclipse.equinox.p2.publisher.eclipse.Feature.setLocation(String)" because "feature" is null
    at org.eclipse.tycho.p2resolver.P2GeneratorImpl.getPublisherActions (P2GeneratorImpl.java:279)
    at org.eclipse.tycho.p2.publisher.AbstractMetadataGenerator.generateMetadata (AbstractMetadataGenerator.java:56)
    at org.eclipse.tycho.p2resolver.P2GeneratorImpl.generateMetadata (P2GeneratorImpl.java:150)
    at org.eclipse.tycho.p2resolver.P2GeneratorImpl.generateMetadata (P2GeneratorImpl.java:454)
    at org.eclipse.tycho.plugins.p2.P2MetadataMojo.attachP2Metadata (P2MetadataMojo.java:179)
    at org.eclipse.tycho.plugins.p2.P2MetadataMojo.execute (P2MetadataMojo.java:161)
    at org.eclipse.tycho.plugins.p2.P2MetadataDefaultMojo.execute (P2MetadataDefaultMojo.java:34)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:126)
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute2 (MojoExecutor.java:328)
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute (MojoExecutor.java:316)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:212)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:174)
    at org.apache.maven.lifecycle.internal.MojoExecutor.access$000 (MojoExecutor.java:75)
    at org.apache.maven.lifecycle.internal.MojoExecutor$1.run (MojoExecutor.java:162)
    at org.apache.maven.plugin.DefaultMojosExecutionStrategy.execute (DefaultMojosExecutionStrategy.java:39)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:159)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:105)
    at io.takari.maven.builder.smart.SmartBuilderImpl.buildProject (SmartBuilderImpl.java:206)
    at io.takari.maven.builder.smart.SmartBuilderImpl$ProjectBuildTask.run (SmartBuilderImpl.java:71)
    at java.util.concurrent.Executors$RunnableAdapter.call (Executors.java:545)
    at java.util.concurrent.FutureTask.run (FutureTask.java:328)
    at java.util.concurrent.ThreadPoolExecutor.runWorker (ThreadPoolExecutor.java:1090)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run (ThreadPoolExecutor.java:614)
    at java.lang.Thread.run (Thread.java:1474)
[ERROR] 
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginExecutionException
[ERROR] 
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR]   mvn <args> -rf :org.eclipse.rcptt.ecl.server