ref: 47faa09b2507bdfb2e3dd983f9aeb1ab54b2f2ef dir: /lib/json/test/inputs/y_number_huge_exp.json/
[0.4e00669999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999969999999006]