dlplibs/qxpfuzzer: Bad-cast to std::__1::__shared_weak_count from invalid vptr in std::__1::shared_ptr<librevenge::RVNGInputStream>::~shared_ptr

Detailed report: https://oss-fuzz.com/testcase?key=5739393340407808 Project: dlplibs Fuzzer: libFuzzerdlplibsqxpfuzzer Fuzz target binary: qxpfuzzer Job Type: libfuzzerubsandlplibs Platform Id: linux Crash Type: Bad-cast Crash Address: 0x000004b0cb90 Crash State: Bad-cast to std::1::sharedweakcou...

dlplibs/qxpfuzzer: Bad-cast to std::__1::__shared_weak_countstd::__1::shared_ptr<librevenge::RVNGInputStream>::~shared_ptr in libqxp::QXPParser::parse

Detailed report: https://oss-fuzz.com/testcase?key=5744289871560704 Project: dlplibs Fuzzer: libFuzzerdlplibsqxpfuzzer Fuzz target binary: qxpfuzzer Job Type: libfuzzerubsandlplibs Platform Id: linux Crash Type: Bad-cast Crash Address: 0x000004d215f0 Crash State: Bad-cast to...