SCM connection URL is inherited with artifactId added

Not sure if this is a bug or a feature (could not find documentation) and if it applies to scm plugin or maven core.

TC:

1. Make a parent pom:

<scm>
<connection>${svn.repository}/trunk/${component.folder}</connection>
</scm>

<properties>
<svn.repository>scm:svn:svn://localhost/myRepo</svn.repository>
<component.folder>components/myParentPomComponent</component.folder>
</properties>

2. Make child pom:

<parent>
<artifactId>myParentPomComponent</artifactId>
</parent>

<properties>
<component.folder>components/myChildComponent</component.folder>
</properties>

3. In folder with child component perform

mvn help:effective-pom|grep svn

Expected result:
scm:svn:svn://localhost/myRepo/trunk/components/myChildComponent

Actual result:
scm:svn:svn://localhost/myRepo/trunk/components/myChildComponent/myChildComponent

4. Add to child pom:

<scm>
<connection>${svn.repository}/trunk/${component.folder}</connection>
</scm>

5. In folder with child component perform

mvn help:effective-pom|grep svn

Actual result:
scm:svn:svn://localhost/myRepo/trunk/components/myChildComponent

----------------------

So if <scm> is omited it is inherited with artifactId applied and that breaks the schema when you specify folder with this component in a property.