Struct SubprocessError 

pub struct SubprocessError { /* private fields */ }

The error recorded for a trial whose child process failed.

Wrapped in Error::Objective so it flows through the study loop like any other objective failure; the message names the exit status and keeps a tail of the child’s stderr. A caller can recover it by downcasting the boxed source of an Error::Objective.

Implementations

impl SubprocessError

pub fn message(&self) -> &str

The failure description.

Trait Implementations

impl Debug for SubprocessError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for SubprocessError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Error for SubprocessError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.