EIPs/EIPS/eip-141.md

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---
eip: 141
title: Designated invalid EVM instruction
author: Alex Beregszaszi (@axic)
type: Standards Track
category: Core
status: Final
created: 2017-02-09
---
## Abstract
An instruction is designated to remain as an invalid instruction.
## Motivation
The invalid instruction can be used as a distinct reason to abort execution.
## Specification
The opcode `0xfe` is the `INVALID` instruction. It can be used to abort the execution (i.e. duplicates as an `ABORT` instruction).
## Backwards Compatibility
This instruction was never used and therefore has no effect on past contracts.
## Copyright
Copyright and related rights waived via [CC0](https://creativecommons.org/publicdomain/zero/1.0/).