Firing a MVEL rule, whose salience is java.lang.Long.MAX_VALUE, in Guvnor

Issue

Problem to fire a MVEL rule, whose salience is 9223372036854775807, in Guvnor. The value 9223372036854775807 is java.lang.Long.MAX_VALUE.

results:
java.lang.NullPointerException is thrown

19:25:12,808 ERROR [RepositoryAssetService] Unable to run the scenario.
java.lang.NullPointerException
        at org.drools.base.mvel.MVELCompilationUnit.createFactory(MVELCompilationUnit.java:267)
        at org.drools.base.mvel.MVELCompilationUnit.getFactory(MVELCompilationUnit.java:281)
        at org.drools.base.mvel.MVELSalienceExpression.getValue(MVELSalienceExpression.java:83)
        at org.drools.common.DefaultAgenda.createActivation(DefaultAgenda.java:565)

If I run a test program in JBDS, I can run without any Exception.