maven version insistence based on wrong variable

MavenCli does

if (System.getProperty("java.class.version", "44.0").compareTo("48.0") < 0) //then echo "sorry we need version 1.4"

however java.class.version is the binary packaging format for the classes, not the supported API. java.version is the supported api, for which sable returns 1.4.2. So the process aborts out, wanting the 1.4 API, when it has 1.4 API (sable has 46.0 instead of 48.0 as the class packaging format used)