astral-sh/uv · error

Failed to take child process stdin

Error message

Failed to take child process stdin

What it means

Error "Failed to take child process stdin" thrown in astral-sh/uv.

Source

Thrown at crates/uv/src/commands/help.rs:357

            .as_ref()
            .map(|path| path.as_os_str().to_os_string())
            .unwrap_or(OsString::from(self.kind.to_string()));

        let args = if self.args.is_empty() {
            self.kind.default_args()
        } else {
            self.args
        };

        let mut child = std::process::Command::new(command)
            .args(args)
            .stdin(std::process::Stdio::piped())
            .spawn()?;

        let mut stdin = child
            .stdin
            .take()
            .ok_or_else(|| anyhow!("Failed to take child process stdin"))?;

        let contents = contents.to_string();
        let writer = std::thread::spawn(move || {
            let _ = write!(stdin, "{heading}\n\n");
            let _ = stdin.write_all(contents.as_bytes());
        });

        drop(child.wait());
        drop(writer.join());

        Ok(())
    }

    /// Get a pager to use and its path, if available.
    ///
    /// Supports the `PAGER` environment variable, otherwise checks for `less` and `more` in the
    /// search path.
    fn try_from_env() -> Option<Self> {

View on GitHub (pinned to f1a42680ff)

When it happens

Trigger: Thrown at crates/uv/src/commands/help.rs:357 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of astral-sh/uv@f1a42680ff (2026-08-16). Data as JSON: /api/errors/040b7af86079890e. Report an issue: GitHub.