[rules-dev] compilation failure on trunk

When I try "mvn clean install -DskipTests", I get this (java version "1.6.0_16"): [INFO] ------------------------------------------------------------------------ [ERROR] BUILD FAILURE [INFO] ------------------------------------------------------------------------ [INFO] Compilation failure /home/ge0ffrey/projects/jboss/drools/drools-core/src/main/java/org/drools/concurrent/ExternalExecutorService.java:[31,7] org.drools.concurrent.ExternalExecutorService is not abstract and does not override abstract method <T>invokeAny(java.util.Collection<? extends java.util.concurrent.Callable<T>>,long,java.util.concurrent.TimeUnit) in java.util.concurrent.ExecutorService /home/ge0ffrey/projects/jboss/drools/drools-core/src/main/java/org/drools/concurrent/ExternalExecutorService.java:[31,7] org.drools.concurrent.ExternalExecutorService is not abstract and does not override abstract method <T>invokeAny(java.util.Collection<? extends java.util.concurrent.Callable<T>>,long,java.util.concurrent.TimeUnit) in java.util.concurrent.ExecutorService -- With kind regards, Geoffrey De Smet