# Function std::io::stderr
1.0.0[−][src]

###

    pub fn stderr() -> StderrⓘNotable traits for Stderrimpl Write for Stderrimpl Write for &Stderr

Constructs a new handle to the standard error of the current process.

This handle is not buffered.

### Note: Windows Portability Consideration

When operating in a console, the Windows implementation of this stream does not support non-UTF-8 byte sequences. Attempting to write bytes that are not valid UTF-8 will return an error.

# Examples

Using implicit synchronization:

    use std::io::{self, Write};

    fn main() -> io::Result<()> {
        io::stderr().write_all(b"hello world")?;

        Ok(())
    }

Run

Using explicit synchronization:

    use std::io::{self, Write};

    fn main() -> io::Result<()> {
        let stderr = io::stderr();
        let mut handle = stderr.lock();

        handle.write_all(b"hello world")?;

        Ok(())
    }

Run