new

# File actionpack/lib/action_dispatch/middleware/exception_wrapper.rb, line 41
    def initialize(backtrace_cleaner, exception)
      @backtrace_cleaner = backtrace_cleaner
      @exception = exception
      @wrapped_causes = wrapped_causes_for(exception, backtrace_cleaner)

      expand_backtrace if exception.is_a?(SyntaxError) || exception.cause.is_a?(SyntaxError)
    end