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Standards Track: Core

EIP-141: Designated invalid EVM instruction

Authors Alex Beregszaszi (@axic)
Created 2017-02-09


An instruction is designated to remain as an invalid instruction.


The invalid instruction can be used as a distinct reason to abort execution.


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 and related rights waived via CC0.


Please cite this document as:

Alex Beregszaszi (@axic), "EIP-141: Designated invalid EVM instruction," Ethereum Improvement Proposals, no. 141, February 2017. [Online serial]. Available: