for i in (0..count-1).rev() {
if self.compress
- && filenames[i+0].extension() != Some(std::ffi::OsStr::new("zst"))
+ && filenames[i].extension() != Some(std::ffi::OsStr::new("zst"))
&& filenames[i+1].extension() == Some(std::ffi::OsStr::new("zst"))
{
Self::compress(&filenames[i], &filenames[i+1], &options)?;