Enum EngineCreateError 

pub enum EngineCreateError {
    Locked(Option<u32>),
    Io(Error),
}

Why Engine::new refused to start. Locked is the cross-process arm of the single-writer invariant (FFI: FMF_E_LOCKED, docs/ARCHITECTURE.md Pipe protocol §single-writer exclusion).

Variants

Locked(Option<u32>)

Another engine process already holds the writer lock (its pid if readable). The cross-process arm of the single-writer invariant.

Io(Error)

The index directory could not be created or its lock could not be opened.

Trait Implementations

impl Debug for EngineCreateError

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

Formats the value using the given formatter.

impl Display for EngineCreateError

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

Formats the value using the given formatter.

impl Error for EngineCreateError

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.

impl From<Error> for EngineCreateError

fn from(source: Error) -> Self

Converts to this type from the input type.