test-phases: test changing null revision phase The behaviour is correct but for bad reasons: the repo.set() call in phase command fails for '-1'. It should be rejected explicitely by phase boundary commands, sadly this is hard to do because phase changes are not applied atomically.

merge with stable

tests: fix test-parseindex2.py when run with --pure

changelog: ensure that nodecache is valid (issue3428) This ensures that an out-of-process hook can see an incoming changegroup.