[Webkit-unassigned] [Bug 277942] New: [JSC] Parse a critical flag on TZ annotation for Temporal

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=277942

            Bug ID: 277942
           Summary: [JSC] Parse a critical flag on TZ annotation for
                    Temporal
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: aosukeke at gmail.com

RFC 3339[1] and RFC 9557[2] allows that bracketed timezone annotations include a critical flag(!)[3].
    It indicate that the parsing should be rejected if there is a conflict between the offset and the
    timezone annotation.

    Temporal API has added this feature into the spec[4]. While the critical flag does not affect the
    behavior of Temporal, parsing must still succeed.

    Currently, JSC throws an error when creating a Temporal object from a string that includes a
    critical flag.

    [1]: https://www.rfc-editor.org/rfc/rfc3339
    [2]: https://www.rfc-editor.org/rfc/rfc9557
    [3]: https://www.rfc-editor.org/rfc/rfc9557.html#name-inconsistent-time-offset-an
    [4]: https://github.com/tc39/proposal-temporal/pull/2397

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