Enum SpawnError 

pub enum SpawnError {
    InboxFull,
    Disconnected,
}

Failure modes for cross-core spawn dispatch. Surfaced by Runtime::spawn_on_core and Runtime::spawn_factory_on_core so callers must explicitly handle back-pressure rather than relying on silent drops — which was the cause of the inbox-saturation hang exposed by runtime_spawn_on_core_silently_drops_on_inbox_overflow in earlier versions.

InboxFull is transient: retry by rebuilding the future and calling again, ideally with a small backoff. The spawn_on_core_blocking_with helper below automates this loop.

Disconnected is terminal: the target core has shut down. The future is dropped; retrying will return the same error.

Implementations that cannot fail on back-pressure (e.g. tokio’s flume::unbounded() mpsc never returns Full) will simply never produce InboxFull and callers see Ok(()) in the steady state.

Variants

InboxFull

The target core’s inbox lane is at capacity. The future has been dropped; the caller should rebuild and retry (see spawn_on_core_blocking_with).

Disconnected

The target core has shut down or never existed (out-of-range CoreId). The future is dropped; retrying is futile.

Trait Implementations

impl Clone for SpawnError

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for SpawnError

impl Debug for SpawnError

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

Formats the value using the given formatter.

impl Display for SpawnError

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

Formats the value using the given formatter.

impl Eq for SpawnError

impl Error for SpawnError

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 PartialEq for SpawnError

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for SpawnError