ref: 90fcb10fa853eb2423ea2351f41a18e2ac0247d6 dir: /lib/json/test/inputs/y_number_huge_exp.json/
[0.4e00669999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999969999999006]