RFR: 7076: Rules and Analysis code has exceptions during uitests [v3]

[Marcus Hirt]

On Sun, 10 Jan 2021 15:21:10 GMT, Henrik Dafgård <hdafgard at openjdk.org> wrote:

>> Fixes exceptions encountered during uitests due to empty grouping arrays.
>
> Henrik Dafgård has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Update copyright year

Marked as reviewed by hirt (Lead).

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PR: https://git.openjdk.java.net/jmc/pull/189