From https://bugs.launchpad.net/catfish-search/+bug/1646714 catfish crashed with UnicodeDecodeError in <lambda>(): 'utf-8' codec can't decode byte 0xcf in position 42: invalid continuation byte Crash while searching in a folder for *.com Other searches complete without error
Sean Davis referenced this bugreport in commit 3ef59849c3bd9982da5bf11bee038583560660d6 Replace unicode decode errors in external search method (bug #14490) https://git.xfce.org/apps/catfish/commit?id=3ef59849c3bd9982da5bf11bee038583560660d6
Fixed in the above commit.