$ cat >> $HGRCPATH <<EOF

  > [extensions]

  > rebase=

  > [phases]

  > publish=False

  > [merge]

  > EOF

  $ hg init repo

  $ cd repo

  $ echo a > a

  $ echo b > b

  $ hg commit -qAm ab

  $ echo c >> a

  $ echo c >> b

  $ hg commit -qAm c

  $ hg up -q ".^"

  $ echo d >> a

  $ echo d >> b

  $ hg commit -qAm d

Testing on-failure=continue

  $ echo on-failure=continue >> $HGRCPATH

  $ hg rebase -s 1 -d 2 --tool false

  rebasing 1:1f28a51c3c9b "c"

  merging a

  merging b

  merging a failed!

  merging b failed!

  unresolved conflicts (see hg resolve, then hg rebase --continue)

  [1]

  $ hg resolve --list

  U a

  U b

  $ hg rebase --abort

  rebase aborted

Testing on-failure=halt

  $ echo on-failure=halt >> $HGRCPATH

  $ hg rebase -s 1 -d 2 --tool false

  rebasing 1:1f28a51c3c9b "c"

  merging a

  merging b

  merging a failed!

  merging b failed!

  unresolved conflicts (see hg resolve, then hg rebase --continue)

  [1]

  $ hg resolve --list

  U a

  U b

  $ hg rebase --abort

  rebase aborted

Testing on-failure=prompt

  $ echo on-failure=prompt >> $HGRCPATH

  $ cat <<EOS | hg rebase -s 1 -d 2 --tool false --config ui.interactive=1

  > y

  > n

  > EOS

  rebasing 1:1f28a51c3c9b "c"

  merging a

  merging b

  merging a failed!

  merging b failed!

  unresolved conflicts (see hg resolve, then hg rebase --continue)

  [1]

  $ hg resolve --list

  U a

  U b

  $ hg rebase --abort

  rebase aborted