NPE when extending a configuration defined in another project

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1

I am able to trigger a NullPointerException in gradle when a project tries to extend the configuration of another subproject.
The following minimal build.gradle file triggers it:

project(':A') {
  configurations { aConfig }
  dependencies { aConfig fileTree('lib') }
}
project(':B') {
  configurations {
    bConfig.extendsFrom(project(':A').configurations.aConfig)
  }
  task crash { doLast { configurations.bConfig.each{} } }
}

I crashes due to a NullPointerException in AbstractModuleDescriptorBackedMetaData.java.

Validated on gradle 2.4 nightly, 2.3 and 2.2.1.

2

Extending configurations from other projects isn’t officially supported. See the development mailing list thread below. What exactly are you trying to accomplish by doing this? Perhaps there is a better solution.

https://mail.google.com/mail/u/1/#search/extend+configuration+from+another+project/14b2d315c6842a0e

3

I’ve gone head and raised this issue as GRADLE-3277.