Tests in https://github.com/rakudo/rakudo/blob/bfe2ad63f8ea17cbc11e836b7fcb1c8f35515cbd/t/04-nativecall/18-routine-sig-sanity.t#L95
- [perl #131696] [LTA] internal error for invalid nat... Jan-Olof Hendig via RT
- [perl #131696] [LTA] internal error for invali... Zoffix Znet via RT