Hi, I'm testing prawn generated PDFs (https://github.com/prawnpdf/prawn) and I have found that when trying to validate them with PreflightParser, I get an unchecked exception instead of an expected org.apache.pdfbox.preflight.exception.ValidationException.
Could it be a problem with the PDF or is it an issue in PDFBox-preflight? I attach the PDF (example-manual.pdf) and here is the stacktrace: Exception in thread "main" java.util.EmptyStackException at java.util.Stack.peek(Stack.java:102) at org.apache.pdfbox.util.PDFStreamEngine.getColorSpaces(PDFStreamEngine.java:579) at org.apache.pdfbox.util.operator.SetNonStrokingColorSpace.process(SetNonStrokingColorSpace.java:50) at org.apache.pdfbox.preflight.content.ContentStreamWrapper.processOperator(ContentStreamWrapper.java:162) at org.apache.pdfbox.util.PDFStreamEngine.processSubStream(PDFStreamEngine.java:268) at org.apache.pdfbox.util.PDFStreamEngine.processSubStream(PDFStreamEngine.java:244) at org.apache.pdfbox.preflight.content.ContentStreamWrapper.validXObjContentStream(ContentStreamWrapper.java:100) at org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectContent(XObjFormValidator.java:113) at org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:76) at org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:77) at org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:81) at org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:54) at org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:191) at org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:78) at org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:81) at org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:54) at org.apache.pdfbox.preflight.process.reflect.SinglePageValidationProcess.validateResources(SinglePageValidationProcess.java:163) at org.apache.pdfbox.preflight.process.reflect.SinglePageValidationProcess.validate(SinglePageValidationProcess.java:82) at org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:81) at org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:54) at org.apache.pdfbox.preflight.process.PageTreeValidationProcess.validatePage(PageTreeValidationProcess.java:58) at org.apache.pdfbox.preflight.process.PageTreeValidationProcess.validate(PageTreeValidationProcess.java:47) at org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:81) at org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:96) at org.apache.pdfbox.preflight.PreflightDocument.validate(PreflightDocument.java:168) Thanks,
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