Enum CheckpointError 

pub enum CheckpointError {
    Incompatible(String),
    Corrupted(String),
    NotCanonical(String),
}

Why a checkpoint could not be assembled, decoded or verified.

The split is the recovery ladder, not the field that failed. Incompatible means “this blob is not for this kernel or not for this operation” — a host answers it by looking for a different checkpoint. Corrupted means “this blob claims to be ours and does not hold together” — the only answer is an older checkpoint plus more tail.

Variants

Incompatible(String)

Wrong checkpoint revision, wrong ABI revision, wrong operation, or a genesis/head this operation never had.

Corrupted(String)

A digest disagrees with the bytes it summarises, or the bounded tail does not cover (base_step_seq, through_step_seq] exactly.

NotCanonical(String)

The value has no canonical byte representation at all.

Implementations

impl CheckpointError

pub fn message(&self) -> &str

pub fn code(&self) -> KernelFaultCode

pub fn fault(&self) -> KernelFault

Host-facing projection (§7.13).

Trait Implementations

impl Clone for CheckpointError

fn clone(&self) -> CheckpointError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CheckpointError

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

Formats the value using the given formatter.

impl Display for CheckpointError

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

The rendered form names its own code.

Not cosmetic: a checkpoint rejected inside serde reaches the caller as a string, and from_checkpoint_bytes has to recover the class from it. Printing the code is what keeps that recovery from being a guess based on which words happen to be in the message.

impl Eq for CheckpointError

impl Error for CheckpointError

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<RecordError> for CheckpointError

fn from(error: RecordError) -> Self

Converts to this type from the input type.

impl PartialEq for CheckpointError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for CheckpointError