DioxusLabs/dioxus · error · anyhow::Error

base64 --decode failed: {}

Error message

base64 --decode failed: {}

What it means

The bundler piped the base64-encoded signing certificate through `base64 --decode` and the decoder exited non-zero (malformed input or missing tooling). The decode failure message includes the command's stderr so the certificate secret can be checked.

Source

Thrown at packages/cli/src/bundler/macos.rs:935

        .stdout(Stdio::piped())
        .stderr(Stdio::piped())
        .spawn()
        .context("Failed to decode base64 certificate")?;

    if let Some(mut stdin) = child.stdin.take() {
        stdin
            .write_all(input.as_bytes())
            .await
            .context("Failed writing base64 certificate to decoder stdin")?;
    }

    let output = child
        .wait_with_output()
        .await
        .context("Failed to decode base64 certificate")?;

    if !output.status.success() {
        bail!(
            "base64 --decode failed: {}",
            String::from_utf8_lossy(&output.stderr)
        );
    }

    Ok(output.stdout)
}

/// The result of DMG bundling, which may include both the `.dmg` and `.app` outputs.
pub(crate) struct DmgBundled {
    /// Paths to the generated `.dmg` file(s).
    pub dmg: Vec<PathBuf>,
    /// Paths to the generated `.app` bundle(s) (if the `.app` was built as a dependency).
    pub app: Vec<PathBuf>,
}

/// A target to be code-signed.
struct SignTarget {

View on GitHub (pinned to 24f6a829df)

Solutions

1. The base64 value could not be decoded. Ensure the API key environment variable contains valid base64.

When it happens

Trigger: Thrown at packages/cli/src/bundler/macos.rs:935 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of DioxusLabs/dioxus@24f6a829df (2026-08-23). Data as JSON: /api/errors/543b3884b3c8d913. Report an issue: GitHub.