find/xargs --help/--version >/dev/full panics

```
$ target/debug/find --version > /dev/full

thread 'main' (19061) panicked at library/std/src/io/stdio.rs:1165:9:
failed printing to stdout: No space left on device (os error 28)
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
```