Enum Trap

#[non_exhaustive]
pub enum Trap {
    StackOverflow,
    MemoryOutOfBounds,
    HeapMisaligned,
    TableOutOfBounds,
    IndirectCallToNull,
    BadSignature,
    IntegerOverflow,
    IntegerDivisionByZero,
    BadConversionToInteger,
    UnreachableCodeReached,
    Interrupt,
    AlwaysTrapAdapter,
    OutOfFuel,
    AtomicWaitNonSharedMemory,
    NullReference,
    ArrayOutOfBounds,
    AllocationTooLarge,
    CastFailure,
    CannotEnterComponent,
}

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

StackOverflow

The current stack space was exhausted.

MemoryOutOfBounds

An out-of-bounds memory access.

HeapMisaligned

A wasm atomic operation was presented with a not-naturally-aligned linear-memory address.

TableOutOfBounds

An out-of-bounds access to a table.

IndirectCallToNull

Indirect call to a null table entry.

BadSignature

Signature mismatch on indirect call.

IntegerOverflow

An integer arithmetic operation caused an overflow.

IntegerDivisionByZero

An integer division by zero.

BadConversionToInteger

Failed float-to-int conversion.

UnreachableCodeReached

Code that was supposed to have been unreachable was reached.

Interrupt

Execution has potentially run too long and may be interrupted.

AlwaysTrapAdapter

When the component-model feature is enabled this trap represents a function that was canon lift’d, then canon lower’d, then called. This combination of creation of a function in the component model generates a function that always traps and, when called, produces this flavor of trap.

OutOfFuel

When wasm code is configured to consume fuel and it runs out of fuel then this trap will be raised.

AtomicWaitNonSharedMemory

Used to indicate that a trap was raised by atomic wait operations on non shared memory.

NullReference

Call to a null reference.

ArrayOutOfBounds

Attempt to access beyond the bounds of an array.

AllocationTooLarge

Attempted an allocation that was too large to succeed.

CastFailure

Attempted to cast a reference to a type that it is not an instance of.

CannotEnterComponent

When the component-model feature is enabled this trap represents a scenario where one component tried to call another component but it would have violated the reentrance rules of the component model, triggering a trap instead.

Implementations

impl Trap

pub fn from_u8(byte: u8) -> Option<Trap>

Converts a byte back into a Trap if its in-bounds

Trait Implementations

impl Clone for Trap

fn clone(&self) -> Trap

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Trap

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

Formats the value using the given formatter.

impl Display for Trap

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

Formats the value using the given formatter.

impl Error for Trap

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 Hash for Trap

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Trap

fn eq(&self, other: &Trap) -> 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 Copy for Trap

impl Eq for Trap

impl StructuralPartialEq for Trap