[Webkit-unassigned] [Bug 161672] New: [INTL] some valid language tags cause errors in Intl constructors

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=161672

            Bug ID: 161672
           Summary: [INTL] some valid language tags cause errors in Intl
                    constructors
    Classification: Unclassified
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: thetalecrafter at gmail.com

The tests for language tag handling in the kangax compat tables[1][2] fail in JSC on some valid language tags:

cmn-hans-cn-t-ca-u-ca-x-t-u
aa-a-foo-x-a-foo-bar
x-en-u-foo
x-en-u-foo-u-bar

Implementations in Firefox, Chrome, and Edge pass these tests.

[1] http://kangax.github.io/compat-table/esintl/
[2] https://github.com/tc39/test262/blob/83b07ff15eadb141c3d6f4d236a8733b720041d2/test/intl402/6.2.2_a.js

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