poppler/pdf_fuzzer: Heap-use-after-free in XRefEntry::setFlag

Project: https://anongit.freedesktop.org/git/poppler/poppler.git Detailed report: https://oss-fuzz.com/testcase?key=5721577681846272 Project: poppler Fuzzer: libFuzzerpopplerpdffuzzer Fuzz target binary: pdffuzzer Job Type: libfuzzerasanpoppler Platform Id: linux Crash Type: Heap-use-after-free...