ErrorKind::WriteZero
RustERRORNotableI/O
Write returned zero bytes
Quick Answer
Use write_all() instead of write(); it loops until all bytes are written.
What this means
A write call wrote zero bytes, indicating the writer can accept no more data.
Why it happens
- 1Calling write() and not retrying when 0 bytes are written
- 2write_all() surfaces this if a write returns 0
Fix
Prefer write_all()
Prefer write_all()
use std::io::Write;
let mut f = std::fs::File::create("out.bin")?;
f.write_all(b"hello")?; // retries internally, errors on WriteZeroWhy this works
write_all() loops on partial writes and returns WriteZero only on true failure.
Code examples
Badrust
writer.write(data)?; // may write 0 bytes silently
Goodrust
writer.write_all(data)?;
Sources
Official documentation ↗
Rust std::io
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