[Webkit-unassigned] [Bug 147098] New: Date.parse should not accept second values of "60"

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=147098

            Bug ID: 147098
           Summary: Date.parse should not accept second values of "60"
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: Unspecified
               URL: http://ecma-international.org/ecma-262/6.0/#sec-date-t
                    ime-string-format
                OS: Unspecified
            Status: NEW
          Keywords: ES5
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ljharb at gmail.com
                CC: darin at apple.com, fpizlo at apple.com,
                    utatane.tea at gmail.com

`Date.parse('2012-12-31T23:59:60.000Z')` should return NaN, and instead returns `Date.parse('2013-01-01T00:00:00.000Z')`
`Date.parse('2015-06-30T23:59:60.000Z')` should return NaN, and instead returns `Date.parse('2015-07-01T00:00:00.000Z')`

Note that the second example is an actual leap second, and it doesn't even work properly.

The spec requires that only seconds from 0 to 59 are supported.

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