    # File lib/chef/formatters/error_inspectors/compile_error_inspector.rb, line 95
            def filtered_bt
              filters = Array(Chef::Config.cookbook_path).map {|p| /^#{Regexp.escape(p)}/ }
              r = exception.backtrace.select {|line| filters.any? {|filter| line =~ filter }}
              Chef::Log.debug("filtered backtrace of compile error: #{r.join(",")}")
              return r.count > 0 ? r : exception.backtrace
            end