Enum WasmHandleError 

pub enum WasmHandleError {
    SlotOutOfRange {
        slot: u32,
        table_size: u32,
    },
    StaleGeneration {
        slot: u32,
        expected: u32,
        actual: u32,
    },
    AlreadyReleased {
        slot: u32,
    },
    InvalidTransfer {
        slot: u32,
        current: WasmHandleOwnership,
    },
    NotPinned {
        slot: u32,
    },
    ReleasePinned {
        slot: u32,
    },
    ReleaseBeforeClosed {
        slot: u32,
        state: WasmBoundaryState,
    },
    ReleaseWithLiveDescendants {
        slot: u32,
        live_descendants: usize,
    },
    OwnershipCycle {
        slot: u32,
        parent_slot: u32,
    },
    InvalidStateTransition {
        slot: u32,
        from: WasmBoundaryState,
        to: WasmBoundaryState,
    },
}

Error when a handle operation violates ownership protocol.

Variants

SlotOutOfRange

Handle slot does not exist in the table.

Fields

slot: u32

Requested slot.

table_size: u32

Current table capacity.

StaleGeneration

Handle generation does not match (stale handle / use-after-free).

Fields

slot: u32

Slot index.

expected: u32

Expected generation at the slot.

actual: u32

Generation in the provided handle.

AlreadyReleased

Handle has already been released.

Fields

slot: u32

Slot index.

InvalidTransfer

Cannot transfer ownership of a handle that is not WasmOwned.

Fields

slot: u32

Slot index.

current: WasmHandleOwnership

Current ownership state.

NotPinned

Cannot unpin a handle that is not pinned.

Fields

slot: u32

Slot index.

ReleasePinned

Cannot release a pinned handle without unpinning first.

Fields

slot: u32

Slot index.

ReleaseBeforeClosed

Cannot release a handle before its boundary lifecycle is closed.

Fields

slot: u32

Slot index.

state: WasmBoundaryState

Current boundary state.

ReleaseWithLiveDescendants

Cannot release a handle while it still owns live descendants.

Fields

slot: u32

Slot index.

live_descendants: usize

Number of non-released descendants still attached to this handle.

OwnershipCycle

Ownership graph contains a cycle instead of a strict tree/forest.

Fields

slot: u32

Descendant slot that re-entered the active traversal stack.

parent_slot: u32

Parent slot from which the cycle edge was observed.

InvalidStateTransition

Boundary state transition was not legal under contract.

Fields

slot: u32

Slot index.

from: WasmBoundaryState

Current boundary state.

to: WasmBoundaryState

Requested boundary state.

Trait Implementations

impl Clone for WasmHandleError

fn clone(&self) -> WasmHandleError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for WasmHandleError

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

Formats the value using the given formatter.

impl Display for WasmHandleError

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

Formats the value using the given formatter.

impl Error for WasmHandleError

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<WasmHandleError> for WasmDispatchError

fn from(source: WasmHandleError) -> Self

Converts to this type from the input type.

impl PartialEq for WasmHandleError

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for WasmHandleError

impl StructuralPartialEq for WasmHandleError