Enum StateLoadError 

pub enum StateLoadError {
    Truncated {
        expected: usize,
        actual: usize,
    },
    BadMagic,
    UnsupportedVersion {
        found: u16,
        supported: u16,
    },
    LengthMismatch {
        declared: u32,
        actual: usize,
    },
    FormatMismatch {
        found: FormatId,
        expected: FormatId,
    },
}

Failure modes when unwrapping an envelope.

Variants

Truncated

Buffer is shorter than the envelope header demands.

Fields

expected: usize

Minimum bytes required.

actual: usize

Actual bytes available.

BadMagic

Magic prefix didn’t match — wrong file, raw plugin state, or corruption.

UnsupportedVersion

Envelope version is newer than this rack build knows.

Fields

found: u16

Version field in the blob.

supported: u16

Maximum version this rack build understands.

LengthMismatch

Payload-length field disagrees with the buffer’s actual length.

Fields

declared: u32

payload_len from the envelope header.

actual: usize

Trailing bytes after the header in the supplied buffer.

FormatMismatch

Payload is from a different format than the host expected. The host can decide whether to surface this as an error or try to feed it anyway (some plugins span multiple formats).

Fields

found: FormatId

Format tag in the envelope.

expected: FormatId

Format the host was loading into.

Trait Implementations

impl Debug for StateLoadError

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

Formats the value using the given formatter.

impl Display for StateLoadError

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

Formats the value using the given formatter.

impl Error for StateLoadError

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<StateLoadError> for Error

fn from(source: StateLoadError) -> Self

Converts to this type from the input type.