I have an xls file which contains a dropdown cell (I didn't create this xls). If I open this document, I can edit it, but as soon as I click to unfold the dropdown, LibreOffice hangs and stop responding. Additionally it hangs the whole system, that is, I cannot even switch to another application or open a terminal (I have to ctrl+alt+f1 and kill libreoffice from the virtual console) I will be happy to send the xls file privately to any developer willing to fix this tremendously critical bug, but the document is private and is not mine, so I cannot post it here publicly.
*** This bug has been marked as a duplicate of bug 65686 ***