ref: f5a7e459867d990f4d9aa2d99706bd58676e5eca dir: /lib/json/test/inputs/y_number_huge_exp.json/
[0.4e00669999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999969999999006]