CodegenPanic for slice on empty(Bytes) - Githubissues

vyperlang / vyper

Pythonic Smart Contract Language for the EVM

https://vyperlang.org

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CodegenPanic for slice on empty(Bytes) #3987

Open cyberthirst opened 3 months ago

cyberthirst commented 3 months ago

Version Information

vyper Version (output of vyper --version OR linkable commit hash vyperlang/vyper@commitish): 0.4.0rc3+commit.80708e6d

Issue description

Certain contracts which contain empty and slice fail to compile.

POC

This contract

#@version 0.4.0.rc3

@external
def foo():
    s: Bytes[2] = slice(empty(Bytes[4]), 0, 2)

fails to compile with:

vyper.exceptions.CodegenPanic: unhandled exception ~empty <empty(Bytes[4])>, parse_Call

credits: @trocher