[jboss-jira] [JBoss JIRA] (DROOLS-4555) functionDefinition parameter with trailing space causes NPE

functionDefinition parameter with trailing space causes NPE ----------------------------------------------------------- Key: DROOLS-4555 URL: https://issues.redhat.com/browse/DROOLS-4555 Project: Drools Issue Type: Bug Reporter: Jonas Tamimi Assignee: Matteo Mortari Priority: Major Hi, this is my first issue, so I hope I did everything right. We have been using version 7.21.0.Final of Drools for the last few months. A few weeks ago we switched to the latest version and could not import a few of our decision models (.dmn) anymore. According to our own research the bug seems to be present since 7.22.0.t042 and is still present in the latest snapshot. This is the relevant logging output: [https://gist.github.com/oas/ec0f70585411d8c3f0266b7d2fd02ebc|https://gist...] I tried to narrow down the exception and it seems to be in the method {{checkVariableName}} of {{org.kie.dmn.feel.parser.feel11.FEELParser}}. {{errorChecker.hasErrors()}} is false, but it is not catched by the if statement in line 111. Because of this, {{errorChecker.getErrors()}} returns null instead of a {{List<FEELEvent>}}. The method {{checkVariableName}} in {{org.kie.dmn.core.compiler.DMNCompilerHelper}}, assumes that a list will be returned and calls {{isEmpty()}}. This throws the {{NullPointerException}}.