On Tue, 1 Aug 2023 at 18:05, Nikolaus Rath <Nikolaus@xxxxxxxx> wrote: > Is it possible that you are running into a variant of > https://github.com/libfuse/libfuse/issues/730? This was fixed in libfuse > 3.14.1 and introduced in 3.13.0. Yes, that was it: a rogue libfuse3 instance installed in /usr/local/lib. With the debian libfuse3 I get ENOTEMPTY as expected. Will look at why this is happening tomorrow. Thanks, Miklos