build_backtrace

# File actionpack/lib/action_dispatch/middleware/exception_wrapper.rb, line 265
      def build_backtrace
        built_methods = {}

        ActionView::PathRegistry.all_resolvers.each do |resolver|
          resolver.built_templates.each do |template|
            built_methods[template.method_name] = template
          end
        end

        (@exception.backtrace_locations || []).map do |loc|
          if built_methods.key?(loc.label.to_s)
            thread_backtrace_location = if loc.respond_to?(:__getobj__)
              loc.__getobj__
            else
              loc
            end
            SourceMapLocation.new(thread_backtrace_location, built_methods[loc.label.to_s])
          else
            loc
          end
        end
      end