tests/test-1102.t

rebase: properly abort when destination is public (issue4896)

After rebasing a set of changes onto a public changeset and having the first one
be skipped, if you try to abort, the operation fails. This fix adds a check to
disallow the target rev into the dstates list within the abort function. This
list is checked for immutable states before the rest of abort does its thing.

  $ rm -rf a
  $ hg init a
  $ cd a
  $ echo a > a
  $ hg ci -Am0
  adding a
  $ hg tag t1 # 1
  $ hg tag --remove t1 # 2

  $ hg co 1
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg tag -f -r0 t1
  $ hg tags
  tip                                3:a49829c4fc11
  t1                                 0:f7b1eb17ad24

  $ cd ..