RegExp error

[ksh8281]

Escargot (please complete the following information):

• OS: Linux

Describe the bug
RegExp.prototype.test result is wrong

Test case
var locale = "de-gregory-gregory"
var re = /(([a-z]|[0-9]){2,8}-)+(([a-z]|[0-9]){5,8}|(0-9{3}))-(([a-z]|[0-9]){2,8}-)*\3(?!([a-z]|[0-9]))/i
print(re.test("de-gregory-gregory"))

Expected behavior
print true

[ksh8281]

related with ./test/test262/test/intl402/Intl/getCanonicalLocales/invalid-tags.js