I have a localc spreadsheet under Ubuntu 20.04 which has worked without any trouble for several years. Suddenly it has taken to crashing localc whenever I try to save it, whether I have made any changes after loading the copy on file or not. Other spreadsheets pose no problem and are recovered normally when I restart after the crash. The problem spreadsheet is also recovered normally after the crash, but if I immediately try to save it, localc crashes again (and the copy on file is unchanged). I have tried restarting the computer but that makes no difference.
What can I do to track down the problem?
localc --version gives:
LibreOffice 6.4.7.2 40(Build:2)