Description: There are a number of crashtesting documents which, when exported to rtf, cannot be reimported without asserting Steps to Reproduce: 1. wget https://bugs.documentfoundation.org/attachment.cgi?id=73361 -O ~/Downloads/tdf59645-2.odt 2. ./instdir/program/soffice --headless --convert-to rtf ~/Downloads/tdf59645-2.odt 3. ./instdir/program/soffice --headless --convert-to pdf ./tdf59645-2.rtf Actual Results: #20 writerfilter::dmapper::DomainMapper_Impl::substream(unsigned int, tools::SvRef<writerfilter::Reference<writerfilter::Stream>> const&) at /home/caolan/LibreOffice/core/sw/source/writerfilter/dmapper/DomainMapper_Impl.cxx:10131 #21 writerfilter::dmapper::DomainMapper::lcl_substream(unsigned int, tools::SvRef<writerfilter::Reference<writerfilter::Stream>> const&) at /home/caolan/LibreOffice/core/sw/source/writerfilter/dmapper/DomainMapper.cxx:4747 #22 writerfilter::LoggedStream::substream(unsigned int, tools::SvRef<writerfilter::Reference<writerfilter::Stream>> const&) at /home/caolan/LibreOffice/core/sw/source/writerfilter/dmapper/LoggedResources.cxx:275 #23 writerfilter::rtftok::RTFDocumentImpl::resolveSubstream(unsigned long, unsigned int, rtl::OUString const&) at /home/caolan/LibreOffice/core/sw/source/writerfilter/rtftok/rtfdocumentimpl.cxx:381 #24 writerfilter::rtftok::RTFDocumentImpl::resolveSubstream(unsigned long, unsigned int) at /home/caolan/LibreOffice/core/sw/source/writerfilter/rtftok/rtfdocumentimpl.cxx:356 Expected Results: reimport without assert Reproducible: Always User Profile Reset: No Additional Info: Might not affect a non-dbgutil version without asserts enabled