Error creates null package without generating error message ----------------------------------------------------------- Key: JBRULES-2588 URL: https://jira.jboss.org/browse/JBRULES-2588 Project: Drools Issue Type: Bug Security Level: Public (Everyone can see) Components: drools-compiler Affects Versions: 5.0.1.FINAL Environment: Windows XP/Eclipse Ganymeade Reporter: Thomas Hehl Assignee: Mark Proctor Priority: Minor Fix For: 5.0.2, 5.1.0.CR1, FUTURE PackageBuilder contains the following method: public void addPackageFromDrl(final Reader reader) throws DroolsParserException, IOException { this.resource = new ReaderResource( reader ); final DrlParser parser = new DrlParser(); final PackageDescr pkg = parser.parse( reader ); this.results.addAll( parser.getErrors() ); if ( !parser.hasErrors() ) { addPackage( pkg ); } this.resource = null; } The problem is that if the parser generates errors, then the package is null and my application blows up later on with a null pointer exception, but the error messages are lost. To fix this problem I recommend a code change like: public void addPackageFromDrl(final Reader reader) throws DroolsParserException, IOException { this.resource = new ReaderResource( reader ); final DrlParser parser = new DrlParser(); final PackageDescr pkg = parser.parse( reader ); this.results.addAll( parser.getErrors() ); if ( parser.hasErrors() ) { System.err.println("Parser errors generating null package:" + this.results.toString()); else{ addPackage( pkg ); } this.resource = null; } This will cause an error dump in the log without changing any functionality. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: https://jira.jboss.org/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira