Consider using ArgCheck.jl

[cgarling]

Technically, @assert calls are not guaranteed to be run depending on the optimization level that Julia is run at, but in practice right now they always do. In the future this might not be the case. It is recommended that checks on function arguments / user data be done with error throws (e.g., if x < 0; throw(DomainError ...); end) or an alternative implementation like ArgCheck.jl that is always guaranteed to run.

I don't care to fix this right now but it is worth keeping an eye on in future releases.