mupdf:pdf_fuzzer: Heap-use-after-free in convert_to_boxes

Project: git://git.ghostscript.com/mupdf.git Detailed Report: https://oss-fuzz.com/testcase?key=5933007097888768 Project: mupdf Fuzzing Engine: libFuzzer Fuzz Target: pdffuzzer Job Type: libfuzzerasanmupdf Platform Id: linux Crash Type: Heap-use-after-free READ 8 Crash Address: 0x521000010548 Cra...