Enum ExpansionError 

pub enum ExpansionError {
    Decode {
        offset: usize,
        reason: String,
    },
    Unsupported(String),
    Counterexample {
        wasm_op_label: String,
        description: String,
    },
    SolverUnknown(String),
    Internal(String),
}

Expansion validation failure reasons. Everything is loud: an instruction or shape outside the modeled subset is an error, never a silent accept.

Variants

Decode

The byte sequence contains an instruction (or branch shape) outside the decoder’s subset. Includes backward branches — loops (the i64 div/rem cores) are held out, not silently skipped.

Fields

offset: usize

reason: String

Unsupported(String)

The (WasmOp, pseudo ArmOp) pair is not in the covered surface.

Counterexample

The sequence is semantically wrong — a concrete counterexample input distinguishes the WASM reference from the emitted sequence.

Fields

wasm_op_label: String

description: String

SolverUnknown(String)

Solver returned unknown (conflict budget exceeded).

Internal(String)

Internal invariant violation (e.g. malformed IT block).

Trait Implementations

impl Debug for ExpansionError

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

Formats the value using the given formatter.

impl Display for ExpansionError

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

Formats the value using the given formatter.

impl Error for ExpansionError

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.