[MNG-5601] multimodule plugin configuration e.g. "build-tools" pattern broken

**[Matthew Jason Benson](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=mbenson)** opened **[MNG-5601](https://issues.apache.org/jira/browse/MNG-5601?redirect=false)** and commented

The recommendation at https://maven.apache.org/plugins/maven-checkstyle-plugin/examples/multi-module-config.html breaks down in projects that use the pattern more than once, e.g. for checkstyle/findbugs/PMD alike. I have boiled this down to a super-simple test project that defines a build-tools module, and in separate profiles declares each of these plugins with a dependency on that submodule. Activating any one of these profiles and calling `mvn validate` works fine, but as soon as you activate two or more of them the command fails with "The projects in the reactor contain a cyclic reference".

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**Affects:** 3.2.1

**Attachments:**
- [cyclic-ref-test.tar.gz](https://issues.apache.org/jira/secure/attachment/12713398/cyclic-ref-test.tar.gz) (_813 bytes_)

4 votes, 5 watchers