How to override default rails ActionView::Base.field_error_proc for individual form builders

submission_form_helper.rb

module SubmissionFormHelper

  # Override the default ActiveRecordHelper behaviour of wrapping the input.
  # This gets taken care of semantically by adding an error class to the wrapper tag
  # containing the input.
  #
  FIELD_ERROR_PROC = proc do |html_tag, instance_tag|
    html_tag
  end

  def submission_form_for(record, options = {}, &block)
    options[:builder] = SubmissionFormBuilder

    with_submission_form_field_error_proc do
      form_for(record, options, &block)
    end

  end

  def submission_fields_for(record_name, record_object = nil, options = {}, &block)
    options, record_object = record_object, nil if record_object.is_a?(Hash) && record_object.extractable_options?
    options[:builder] ||= SubmissionFormBuilder

    with_submission_form_field_error_proc do
      fields_for(record_name, record_object, options, &block)
    end
  end


  private

  def with_submission_form_field_error_proc
    default_field_error_proc = ::ActionView::Base.field_error_proc
    begin
      ::ActionView::Base.field_error_proc = FIELD_ERROR_PROC
      yield
    ensure
      ::ActionView::Base.field_error_proc = default_field_error_proc
    end
  end

  class SubmissionFormBuilder < ActionView::Helpers::FormBuilder

  end

end

Thank you for this snippet.
It seems like there's really no other way to set builder-specific field_error_proc.

What about performance?
Is it a code smell?