Re: libreoffice didn't save my work
OH OH, I fear the worst for you ...
You need to see if the file is now zero-size. You can do that by looking at the file properties in Nautilus of by opening a terminal and enter "ls -l filename" (lowercase L, filename = name of the file).
If it IS zero size, then it is gone.
I had the same happen to me -- and was able to determine that this was a BUG in Open Office. Which is why I quite using it. It looks like the same bug may have carried over to LibreOffice.
Ubuntu 15.04 Mate, Mint 17.1; MS Win 8.1, Win10 TP.
Will not respond to PM requests for support -- use the forums.