How can I fix java.lang.NullPointerException caused by TraceGovernor in Jaspersoft studio plugin? -

i'm writing plugin jaspersoft studio up-to-date. plugin crashes, when trying open preview of report. (from plugin) stack trace of java.lang.nullpoinpointerexception:

com.jaspersoft.studio.debug.tracegovernor.setup(tracegovernor.java:111) com.jaspersoft.studio.debug.tracegovernor.initmaps(tracegovernor.java:118) com.jaspersoft.studio.debug.tracegovernor.beforereportinit(tracegovernor.java:162) net.sf.jasperreports.engine.fill.jrfilldatasetscriptlet.beforereportinit(jrfilldatasetscriptlet.java:74) net.sf.jasperreports.engine.jrabstractscriptlet.callbeforereportinit(jrabstractscriptlet.java:176) net.sf.jasperreports.engine.fill.jrverticalfiller.fillreportstart(jrverticalfiller.java:236) net.sf.jasperreports.engine.fill.jrverticalfiller.fillreport(jrverticalfiller.java:115) net.sf.jasperreports.engine.fill.jrbasefiller.fill(jrbasefiller.java:580) net.sf.jasperreports.engine.fill.basereportfiller.fill(basereportfiller.java:414) net.sf.jasperreports.engine.fill.basefillhandle$reportfill.run(basefillhandle.java:119) java.lang.thread.run(thread.java:745) 

non of code in stack trace mine. think can't load necessary classes. (jaspersoft studio can load necessary libraries) know, please? many thanks.

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edit

i've found, it's caused property in jaspersoft studio, loads extension, loading tracegovernor. it's debugging report, isn't compatible plug-in.

net.sf.jasperreports.extension.registry.factory.governor=com.jaspersoft.studio.debug.tracegovernorextensionsregistryfactory 

i've solved removing java package com.jaspersoft.studio_6.3.0.final.jar\jasperreports_extension.properties, non-destructive method, how disable extension.

the relevant source code available at:

http://anonsvn:anonsvn@code.jaspersoft.com/svn/repos/jaspersoftstudio/tags/6_3_0_final/com.jaspersoft.studio/src/com/jaspersoft/studio/debug/tracegovernor.java

the npe appears result of uninitialized jrconfig field in tracegovernor class, initialized had getjasperreportscontext() of scriptletfactorycontext context in constructor of tracegovernor returned instanceof jasperreportsconfiguration.

you may checkout , navigate repository further investigate reason npe. otherwise, can suggest file bug report jaspersoft.