Don't raise and rescue exception - just check

virtus_attribute_coercer_call_patch.rb

# encoding: utf-8

# Source: https://gist.github.com/kml/da4f7cf70008986b3ba5
# Issue: https://github.com/solnic/coercible/issues/16

require "virtus/attribute/coercer"

# Coercible::Coercer::Object#to_string doesn't know how to coerce nil
# https://github.com/solnic/virtus/blob/master/lib/virtus/attribute/coercer.rb#L31

module Virtus
  class Attribute
    class Coercer
      alias virtus_call call

      def call(value)
        return if value.nil?
        virtus_call(value)
      end
    end
  end
end