Enum BackendDialError 

pub enum BackendDialError {
    EmptyBackendPipe,
    Connect(Error),
    IntoBackendIo(IntoBackendIoError),
}

Why dialing the negotiated backend failed.

Mirrors the v1 distinctions rather than collapsing them: “the broker named no backend” and “the backend would not accept” call for different consumer behaviour, and v1 already separates them (EmptyBackendPipe vs BackendConnect).

Variants

EmptyBackendPipe

The broker negotiated successfully but named no backend.

Not a refusal: the v2 broker replies with an empty backend_pipe when a service is registered and version-compatible but its daemon has not published yet. Retrying later can succeed, which is why this is not folded into the connect error.

Connect(Error)

The backend pipe was named but would not accept a connection.

IntoBackendIo(IntoBackendIoError)

The connection was made but could not be handed back as an owned handle — on Windows, always (#720).

Trait Implementations

impl Debug for BackendDialError

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

Formats the value using the given formatter.

impl Display for BackendDialError

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

Formats the value using the given formatter.

impl Error for BackendDialError

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.