mount: detect and deal with seeking beyond end of file - fixes #828

cmd/mount/fs.go

@@ -68,6 +68,7 @@ func mountOptions(device string) (options []fuse.MountOption) {
 // returns an error, and an error channel for the serve process to
 // report an error when fusermount is called.
 func mount(f fs.Fs, mountpoint string) (<-chan error, error) {
+	fs.Debug(f, "Mounting on %q", mountpoint)
 	c, err := fuse.Mount(mountpoint, mountOptions(f.Name()+":"+f.Root())...)
 	if err != nil {
 		return nil, err