RFR: 8266846: Add java.time.InstantSource [v3]

[Naoto Sato]

On Tue, 18 May 2021 23:18:42 GMT, Stephen Colebourne <scolebourne at openjdk.org> wrote:

>> 8266846: Add java.time.InstantSource
>
> Stephen Colebourne has updated the pull request incrementally with one additional commit since the last revision:
> 
>   8266846: Add java.time.InstantSource

Another test started failing with your fix.  Apparently, the following piece in java/time/test/java/time/TestClock_System.java throws ExceptionInInitializerError.

        static {
            try {
                offsetField = Class.forName("java.time.Clock$SystemClock").getDeclaredField("offset");
                offsetField.setAccessible(true);
            } catch (ClassNotFoundException | NoSuchFieldException ex) {
                throw new ExceptionInInitializerError(ex);
            }
        }

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PR: https://git.openjdk.java.net/jdk/pull/4016