Enum InvalidBytecode 

pub enum InvalidBytecode {
    StackUnderflow,
    InvalidInstruction,
    InvalidBuiltin,
    InvalidStringId,
    MalformedHeader,
    ProgramOutOfBounds,
    StackOutOfBounds,
    Utf8Error(Utf8Error),
}

Errors that may only be caused due to invalid bytecode.

If this error is returned by an espy program compiled by a compatible version of the compiler, it is considered an espy bug.

Variants

StackUnderflow

Caused by an imbalance in stack operations.

Well-behaved bytecode never has any reason to cause this.

InvalidInstruction

An instruction byte had an unexpected value.

InvalidBuiltin

A clone referred to a builtin value that does not exist.

InvalidStringId

An instruction referred to a string id that did not exist.

MalformedHeader

Occurs when the header is too short or describes a program which is longer than the provided slice.

ProgramOutOfBounds

Occurs when the program counter becomes greater than the length of the program.

Note the “greater”; a pc of the program’s length (after the last byte) is considered an intentional return.

StackOutOfBounds

Occurs when a stack access goes beyond the length of the stack.

Utf8Error(Utf8Error)

Trait Implementations

impl Debug for InvalidBytecode

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

Formats the value using the given formatter.

impl Display for InvalidBytecode

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

Formats the value using the given formatter.

impl From<InvalidBytecode> for Error

fn from(e: InvalidBytecode) -> Error

Converts to this type from the input type.