`$ mvn test` produces errors, with core file ``` $ file core core: ELF 64-bit LSB core file x86-64, version 1 (SYSV), SVR4-style, from '/opt/java/jdk-10/bin/java -javaagent:/home/ed/.m2/repository/org/jacoco/org.jac' ``` Works with JDK <= 9