Cannot use offline (-o) if a <parent> is declared

Create a simple project:

mvn archetype:create -DgroupId=test -DartifactId=offline_parent_test -DarchetypeArtifactId=maven-archetype-quickstart

edit the pom.xml and add a parent entry that you know exists in your local repository, e.g.

<parent>
<groupId>com.test</groupId>
<artifactId>MyParent</artifactId>
<version>1.0-SNAPSHOT</version>
</parent>

run

mvn -o install

produces the following error:

[INFO]
NOTE: Maven is executing in offline mode. Any artifacts not already in your local
repository will be inaccessible.

[INFO] Scanning for projects...
[INFO] snapshot com.test:MyParent:1.0-SNAPSHOT: checking for updates from maven.catlin.com.repo.snapshots
[INFO] ------------------------------------------------------------------------
[ERROR] FATAL ERROR
[INFO] ------------------------------------------------------------------------
[INFO] Failed to resolve artifact.

GroupId: com.test
ArtifactId: MyParent
Version: 1.0-SNAPSHOT

Reason: System is offline.

com.test:MyParent:pom:1.0-SNAPSHOT

NOTE: Maven is executing in offline mode. Any artifacts not already in your local
repository will be inaccessible.