Created attachment 109753 [details]
Error stack trace
xlsx file generated in python makes crash whole LibreOffice when opening the file.
Bug has been already reported in openpyxl library, but it seems that the problem is in LibreOffice its self.
For more details see: https://bitbucket.org/openpyxl/openpyxl/issue/384/libreoffice-on-mac-os-x-crash
Attached stack trace from LibreOffice crash on Mac OS X.
Created attachment 109754 [details]
attaching it here locally as well
unexpected exception in 4-3, ok in master, possibly one of the problems detected with coverity that just needs to be backported
Already fixed in master, backport proposed for 4-3 at https://gerrit.libreoffice.org/12981