RFR: 7076: Rules and Analysis code has exceptions during uitests [v2]

[Henrik Dafgård]

> 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:

  Fix whitespace

-------------

Changes:
  - all: https://git.openjdk.java.net/jmc/pull/189/files
  - new: https://git.openjdk.java.net/jmc/pull/189/files/ea6cf8e9..5c35cbf6

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jmc&pr=189&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jmc&pr=189&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jmc/pull/189.diff
  Fetch: git fetch https://git.openjdk.java.net/jmc pull/189/head:pull/189

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