FULL PRODUCT VERSION :
java version "1.7.0_80"
Java(TM) SE Runtime Environment (build 1.7.0_80-b15)
Java HotSpot(TM) 64-Bit Server VM (build 24.80-b11, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
Linux 4.4.0-36-generic #55-Ubuntu SMP Thu Aug 11 18:01:55 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux


EXTRA RELEVANT SYSTEM CONFIGURATION :
Timezone is Kolkata (India)

A DESCRIPTION OF THE PROBLEM :
Consistent NullPointerException in NativeDate.java



STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Run main method below:

import javax.script.ScriptEngine;
import javax.script.ScriptEngineFactory;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;

public class Bug {

public static void main(String[] args) {
System.out.println("java version"+System.getProperty("java.version"));
ScriptEngine engine=new ScriptEngineManager().getEngineByName("JavaScript");
final ScriptEngineFactory factory=engine.getFactory();
System.out.println(""+factory.getParameter(ScriptEngine.ENGINE)+"/"+factory.getParameter(ScriptEngine.ENGINE_VERSION)+"/"+factory.getParameter(ScriptEngine.LANGUAGE)+"/"+factory.getParameter(ScriptEngine.LANGUAGE_VERSION)+"/"+factory.getParameter(ScriptEngine.NAME));
System.out.println("");
try {
engine.eval("var obj= new Date(1980,0, 12);");
System.out.println(engine.eval("''+obj;"));
} catch (ScriptException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

}

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
No Exception, a javascript date is printed as a string.

Sat Jan 12 1980 00:00:00 GMT+0530 (IST)
ACTUAL -
java version1.7.0_80
Mozilla Rhino/1.7 release 3 PRERELEASE/ECMAScript/1.8/javascript

Exception in thread "main" java.lang.NullPointerException
at sun.org.mozilla.javascript.internal.NativeDate.DaylightSavingTA(NativeDate.java:640)
at sun.org.mozilla.javascript.internal.NativeDate.LocalTime(NativeDate.java:713)
at sun.org.mozilla.javascript.internal.NativeDate.date_format(NativeDate.java:1074)
at sun.org.mozilla.javascript.internal.NativeDate.execIdCall(NativeDate.java:257)
at sun.org.mozilla.javascript.internal.IdFunctionObject.call(IdFunctionObject.java:126)
at sun.org.mozilla.javascript.internal.ScriptableObject.getDefaultValue(ScriptableObject.java:820)
at sun.org.mozilla.javascript.internal.ScriptableObject.getDefaultValue(ScriptableObject.java:760)
at sun.org.mozilla.javascript.internal.NativeDate.getDefaultValue(NativeDate.java:97)
at sun.org.mozilla.javascript.internal.ScriptRuntime.add(ScriptRuntime.java:2651)
at sun.org.mozilla.javascript.internal.Interpreter.do_add(Interpreter.java:3044)
at sun.org.mozilla.javascript.internal.Interpreter.interpretLoop(Interpreter.java:1334)
at sun.org.mozilla.javascript.internal.Interpreter.interpret(Interpreter.java:849)
at sun.org.mozilla.javascript.internal.InterpretedFunction.call(InterpretedFunction.java:162)
at sun.org.mozilla.javascript.internal.ContextFactory.doTopCall(ContextFactory.java:430)
at com.sun.script.javascript.RhinoScriptEngine$1.superDoTopCall(RhinoScriptEngine.java:116)
at com.sun.script.javascript.RhinoScriptEngine$1.doTopCall(RhinoScriptEngine.java:109)
at sun.org.mozilla.javascript.internal.ScriptRuntime.doTopCall(ScriptRuntime.java:3160)
at sun.org.mozilla.javascript.internal.InterpretedFunction.exec(InterpretedFunction.java:173)
at sun.org.mozilla.javascript.internal.Context.evaluateReader(Context.java:1169)
at com.sun.script.javascript.RhinoScriptEngine.eval(RhinoScriptEngine.java:214)
at com.sun.script.javascript.RhinoScriptEngine.eval(RhinoScriptEngine.java:240)
at javax.script.AbstractScriptEngine.eval(AbstractScriptEngine.java:264)
at com.giantslogik.policylitmus.core.ecommerce.Bug.main(Bug.java:18)


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import javax.script.ScriptEngine;
import javax.script.ScriptEngineFactory;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;

public class Bug {

public static void main(String[] args) {
System.out.println("java version"+System.getProperty("java.version"));
ScriptEngine engine=new ScriptEngineManager().getEngineByName("JavaScript");
final ScriptEngineFactory factory=engine.getFactory();
System.out.println(""+factory.getParameter(ScriptEngine.ENGINE)+"/"+factory.getParameter(ScriptEngine.ENGINE_VERSION)+"/"+factory.getParameter(ScriptEngine.LANGUAGE)+"/"+factory.getParameter(ScriptEngine.LANGUAGE_VERSION)+"/"+factory.getParameter(ScriptEngine.NAME));
System.out.println("");
try {
engine.eval("var obj= new Date(1980,0, 12);");
System.out.println(engine.eval("''+obj;"));
} catch (ScriptException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

}
---------- END SOURCE ----------