Compilation fails with a StackOverflowError with Java 1.8, (Scala 2.12.10 = Spark 2.4.6) driven by scala-maven-plugin, on JavaScanner.skipBlockComment

Question

I attempt to compile a mixed Java / Scala project with scala-maven-plugin 2.4.0.

The parent pom used is the one following, scala.version = 2.12, with depende