Not compatible with Java8 Nashorn engine

[lapsus63]

I couldn't make this run using JDK 8.0_131 (x64).
Here is the stack trace :

Exception in thread "main" java.lang.ArrayStoreException: jdk.nashorn.internal.runtime.Undefined
at jdk.nashorn.internal.runtime.arrays.ObjectArrayData.setEmpty(ObjectArrayData.java:161)
at jdk.nashorn.internal.runtime.arrays.ObjectArrayData.delete(ObjectArrayData.java:228)
at jdk.nashorn.internal.runtime.ScriptObject.delete(ScriptObject.java:3309)
at jdk.nashorn.internal.objects.NativeArray.shift(NativeArray.java:1170)
at jdk.nashorn.internal.scripts.Script$13$^eval_.:program(:32)
at jdk.nashorn.internal.runtime.ScriptFunctionData.invoke(ScriptFunctionData.java:637)
at jdk.nashorn.internal.runtime.ScriptFunction.invoke(ScriptFunction.java:494)
at jdk.nashorn.internal.runtime.ScriptRuntime.apply(ScriptRuntime.java:393)
at jdk.nashorn.api.scripting.NashornScriptEngine.evalImpl(NashornScriptEngine.java:449)
at jdk.nashorn.api.scripting.NashornScriptEngine.evalImpl(NashornScriptEngine.java:406)
at jdk.nashorn.api.scripting.NashornScriptEngine.evalImpl(NashornScriptEngine.java:402)
at jdk.nashorn.api.scripting.NashornScriptEngine.eval(NashornScriptEngine.java:150)
at javax.script.AbstractScriptEngine.eval(AbstractScriptEngine.java:249)
at uglify.UglifyJS.run(UglifyJS.java:75)
at uglify.UglifyJS.exec(UglifyJS.java:50)
at uglify.ant.UglifyTask.execute(UglifyTask.java:237)
at uglify.ant.UglifyTask.main(UglifyTask.java:37)

I tried with an old JDK6u45 (x64) -> too old

I tried with JDK 7.0.40:

• Ok if I run from main

• Nok if I run from ant task (uglify is not defined):

  [uglify] javax.script.ScriptException: sun.org.mozilla.javascript.internal.EvaluatorException: Cannot modify a property of a sealed object: remove. (#12) in at line number 12
  [uglify] Caused by: sun.org.mozilla.javascript.internal.EvaluatorException: Cannot modify a property of a sealed object: remove. (#12)

  [uglify] javax.script.ScriptException: sun.org.mozilla.javascript.internal.EcmaError: ReferenceError: "uglify" n'est pas défini (it seems UglifyJS-java can't read non-ASCII characters in UTF8 files #1) in at line number 1
  [uglify] Caused by: sun.org.mozilla.javascript.internal.EcmaError: ReferenceError: "uglify" n'est pas défini (it seems UglifyJS-java can't read non-ASCII characters in UTF8 files #1)