PDFDoc::markObject in PDFDoc.cc in Poppler 0.74.0 mishandles dict marking, leading to stack consumption in the function Dict::find() located at Dict.cc, which can (for example) be triggered by passing a crafted pdf file to the pdfunite binary.
CREATE(Triage): {Link=https://nvd.nist.gov/vuln/detail/CVE-2019-9903 User=admin}
