new

# File actionpack/lib/action_dispatch/middleware/exception_wrapper.rb, line 48
    def initialize(backtrace_cleaner, exception)
      @backtrace_cleaner = backtrace_cleaner
      @exception_class_name = exception.class.name
      @wrapped_causes = wrapped_causes_for(exception, backtrace_cleaner)
      @exception = exception
      if exception.is_a?(SyntaxError)
        @exception = ActiveSupport::SyntaxErrorProxy.new(exception)
      end
      @backtrace = build_backtrace
    end