Enum SpawnError 

pub enum SpawnError {
    SupervisorGone,
    Rejected {
        source: GenericError,
    },
}

Error returned when spawning a dynamic child on a Supervisor fails.

Variants

SupervisorGone

The supervisor isn’t currently running, so it can’t accept the spawn.

Returned when the supervisor hasn’t started yet, is between restarts, or has shut down – and also if the run ends after the request is accepted but before the child is started. To add children before the supervisor starts, configure them statically with Supervisor::add_worker instead.

Rejected

The supervisor was running but rejected the spawn (for example, an invalid child name).

Unlike SupervisorGone, the supervisor accepted the request and then couldn’t start the child; the underlying error is preserved as the source.

Fields

source: GenericError

The underlying error that caused the spawn to be rejected.

Trait Implementations

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, __snafu_display_formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Error for SpawnError

where Self: Debug + Display,

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 ErrorCompat for SpawnError

fn backtrace(&self) -> Option<&Backtrace>

Returns a Backtrace that may be printed.

fn iter_chain(&self) -> ChainCompat<'_, '_>

where Self: AsErrorSource,

Returns an iterator for traversing the chain of errors, starting with the current error and continuing with recursive calls to Error::source.