LibreOffice compatibility (ask to repair the file)

[leiblix]

Recently, LibreOffice started reporting files generated by OpcZip as corrupted.

Fastexcel: dhatim/fastexcel#486
Apache POI: apache/poi#154

Bug report on LibreOffice is here https://bugs.documentfoundation.org/show_bug.cgi?id=163384#c5

The problem is kind of related #9

Sizes are written as Long (ZIP64), but there is no zip64 extension provided => LibreOffice read just first 32 bites of these and the remaining bytes are detected like loopholes in ZIP.

[leiblix]

According to the latest message, they have read your article (https://rzymek.github.io/post/excel-zip64/) and will fix it in LibreOffice.

So basically, the package is not a fully valid zip64, but it is an industry standard defined by Excel. :-|

If they fix it (I hope so), I will close this task myself.