When I run the build with
./gradlew build

It gets stuck for days on
:hibernate-core:runTestSourceGenerators UP-TO-DATE
:hibernate-core:compileTestJava UP-TO-DATE
:hibernate-core:processTestResources UP-TO-DATE
:hibernate-core:testClasses UP-TO-DATE
:hibernate-core:findbugsTest UP-TO-DATE
> Building > :hibernate-core:test > 2462 tests completed, 109 skipped

When I run the build using
./gradlew build -x test
:hibernate-envers:compileJava
/home/jsiddharth/workspace/hibernate-orm-master/hibernate-envers/target/generated-src/apt/main/org/hibernate/envers/internal/EnversMessageLogger_$logger.java:37: error: duplicate class: org.hibernate.envers.internal.EnversMessageLogger_$logger
public class EnversMessageLogger_$logger
^
1 error
:hibernate-envers:compileJava FAILED

FAILURE: Build failed with an exception.

• What went wrong:
  Execution failed for task ':hibernate-envers:compileJava'.
  > Compilation failed; see the compiler error output for details.

• Try:
  Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED

I reach this stage of the build only after I have commented out some code to reach this point
hibernate-entitymanager/src/test/java/org/hibernate/jpa/test/criteria/paths/SingularAttributeJoinTest.java

Line 127
private Integrator getIntegrator() {
return new Integrator() {

@Override
public void integrate(Configuration configuration, SessionFactoryImplementor sessionFactory, SessionFactoryServiceRegistry serviceRegistry)