Looks like the 6.9 support for OSGi does not work well with 3.5.2 version of equinox. The 6.9 "netigso" support is using:
Enumeration en = bundle.findEntries("", "", true);
to get all entries from a bundle. This works OK with Felix, as well as Equinox 3.5, but with new version the en is null. The fix is to
Enumeration en = bundle.findEntries("", null, true);
core-main#682caf73619e (rooted at release69_base)
Integrated into 'main-golden', will be available in build *201007140001* on http://bits.netbeans.org/dev/nightly/ (upload may still be in progress)
User: Jaroslav Tulach <email@example.com>
Log: #188603: Using null parameter which seems to work with equinox 3.5.2 and checking for null return value
Netbinox build with equinox 3.5.2 and this fix:
succeeded. Marking verified.
The fix has been ported into the release691 branch.
*** Bug 189925 has been marked as a duplicate of this bug. ***