javac -fullversion output is
javac -fullversion: compiler message file broken: key=javac.fullversion arguments=javac, 1.8.0-ea-b9313, {2}, {3}, {4}, {5}, {6}, {7}

failed test:
tools/javac/VersionOpt.java

Looks like it could have been due to
7108669: cleanup Log methods for direct printing to streams