Confusing error when using incorrect type in migration

[matthewmcgarvey]

When adding a column, I accidentally specified the type as Boolean instead of Bool and received an error like this:
Unhandled exception: Negative argument (ArgumentError)

I would expect a compilation error about the incorrect type.

Example:

class AddUsers::V20210625020710 < Avram::Migrator::Migration::V1
  def migrate
    create :users do
      primary_key id : Int64
      add_timestamps
      add admin : Boolean
    end
  end

  def rollback
    drop :users
  end
end