Enum DecodeError 

pub enum DecodeError {
    FrameTooLarge {
        body: usize,
        max: usize,
    },
    Rmp(Error),
    KeepAlive,
}

Errors from the sync decoder.

Variants

FrameTooLarge

The length prefix declared a body larger than the caller’s cap. Raised before any body allocation (WIRE-021).

Fields

body: usize

max: usize

Rmp(Error)

Well-formed frame, malformed MessagePack payload (WIRE-023).

KeepAlive

A zero-length frame: a valid keep-alive carrying no body (WIRE-024), reached through a typed decode that needs one.

Distinct from DecodeError::Rmp on purpose. A zero-length body genuinely cannot be a Request/Response, but it is not malformed — it is a liveness tick a peer deliberately sent. Callers match on the intent and skip it; before this variant existed they had to recognize it as a parse failure, which is why products wrapped the reader to eat zero-length frames before delegating.

decode_frame_raw returns these as an empty body instead.

Trait Implementations

impl Debug for DecodeError

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

Formats the value using the given formatter.

impl Display for DecodeError

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

Formats the value using the given formatter.

impl Error for DecodeError

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 DecodeError

fn from(source: Error) -> Self

Converts to this type from the input type.