Infinite loop instead of NPE ---------------------------- Key: JBRULES-3196 URL: https://issues.jboss.org/browse/JBRULES-3196 Project: Drools Issue Type: Bug Security Level: Public (Everyone can see) Components: drools-core (expert) Affects Versions: 5.3.0.Beta1 Reporter: Wolfgang Laun Assignee: Mark Proctor Priority: Critical Fix For: 5.3.0.CR1 The marked statement results in an infinite loop if the HashMap gradeMap is not initialized. Expected behaviour is to throw an exception, e.g. NPE. import java.util.HashMap; declare Student name : String @key gradeMap : HashMap end rule KickOff when then Student s = new Student( "Joe" ); insert( s ); end rule "Subject grade points" dialect "mvel" when $u : Student() then System.out.println("Adding marks for " + $u.getName() ); $u.gradeMap["CompSc"] += 100; ###<<<<<<<<<<<<<<<<<<<<<<<<<<<<< LOOP System.out.println("Marks added"); end -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira