The initial groups defined under 8006164 didn't quite aggregate the primary groups in the right way. The following changes are needed:

diff -r 7aa0c1fb6fdb test/TEST.groups
--- a/test/TEST.groups
+++ b/test/TEST.groups
@@ -131,6 +131,7 @@
 # Compact 2 adds full VM tests
 compact2 = \
   :compact2_minimal \
+ :compact1 \
   :needs_full_vm_compact2 \
  -:needs_compact3 \
  -:needs_jre \
@@ -165,6 +166,7 @@
 compact2_minimal = \
   :compact1_minimal \
   :needs_compact2 \
+ -:needs_full_vm_compact2 \
  -:needs_compact3 \
  -:needs_jre \
  -:needs_jdk

Because of the minimal groups there is a fork in dependency tree - so compact2 has to combine with compact1 to ensure it picks up the compact1 tests that require a full VM. And compact2_minimal has to explicitly exclude needs_full_vm_compact2 otherwise it can pull in full VM tests from the needs_compact2 group.