With the provided PDF file, the following error stack trace is thrown:

WARNING: Error Processing Type 4 definition
java.util.EmptyStackException
at java.util.Stack.peek(Stack.java:102)
at org.icepdf.core.pobjects.functions.postscript.OperatorFactory$12.eval(OperatorFactory.java:238)
at org.icepdf.core.pobjects.functions.postscript.Lexer.operandStart(Lexer.java:234)
at org.icepdf.core.pobjects.functions.postscript.Lexer.parse(Lexer.java:115)
at org.icepdf.core.pobjects.functions.Function_4.calculate(Function_4.java:94)
at org.icepdf.core.pobjects.graphics.ShadingPattern.calculateValues(ShadingPattern.java:255)
at org.icepdf.core.pobjects.graphics.ShadingType2Pattern.calculateColour(ShadingType2Pattern.java:253)
at org.icepdf.core.pobjects.graphics.ShadingType2Pattern.calculateColorPoints(ShadingType2Pattern.java:202)
at org.icepdf.core.pobjects.graphics.ShadingType1Pattern.init(ShadingType1Pattern.java:129)
at org.icepdf.core.util.content.AbstractContentParser.commonFill(AbstractContentParser.java:1912)
at org.icepdf.core.util.content.AbstractContentParser.consume_f(AbstractContentParser.java:1112)
at org.icepdf.core.util.content.NContentParser.parse(Unknown Source)
at org.icepdf.core.pobjects.Form.init(Form.java:197)
at org.icepdf.core.util.content.AbstractContentParser.consume_Do(AbstractContentParser.java:563)
at org.icepdf.core.util.content.NContentParser.parse(Unknown Source)
at org.icepdf.core.pobjects.Page.init(Page.java:399)
at org.icepdf.ri.common.views.AbstractPageViewComponent$PageImageCaptureTask.call(AbstractPageViewComponent.java:410)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)