Why unwrap() in process wait_with_output？i think that was danger

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1 
    #[stable(feature = "process", since = "1.0.0")]
    pub fn wait_with_output(mut self) -> io::Result<Output> {
        drop(self.stdin.take());

        let (mut stdout, mut stderr) = (Vec::new(), Vec::new());
        match (self.stdout.take(), self.stderr.take()) {
            (None, None) => {}
            (Some(mut out), None) => {
                let res = out.read_to_end(&mut stdout);
                res.unwrap();
            }
            (None, Some(mut err)) => {
                let res = err.read_to_end(&mut stderr);
                res.unwrap();
            }
            (Some(out), Some(err)) => {
                let res = read2(out.inner, &mut stdout, err.inner, &mut stderr);
                res.unwrap();
            }
        }

        let status = self.wait()?;
        Ok(Output {
            status,
            stdout,
            stderr,
        })
    }
}

wait_with_output

2

I’m guessing those are infallible operations but the API returns Result which is #[must_use]. What exactly are you concerned with?

3

my code break sometimes and i think it maybe cause of that

4

Can you provide more details?