Created attachment 171796 [details] the file crashing on opening trying to open the file I saved a week earlier, crash on opening. Simple file with data, and format, nothing weird.
...Now, it opens normaly .?!? You may discard this bug if nothing found intersting in the crash report.
No pb to open the file. You can try to upgrade to LO 7.1.3 + take a look at https://wiki.documentfoundation.org/QA/FirstSteps. Anyway, if you don't reproduce the pb and since the crashreport only contains: 0 mergedlo.dll 0x2a6b0c9 it won't help much. Let's put this one as WFM then.