This test file test the #6028 issue

evolve fails with mercurial.error.ProgrammingError: unsupported changeid '' of type <type 'str'>

https://bz.mercurial-scm.org/show_bug.cgi?id=6028

Global setup

============

  $ . $TESTDIR/testlib/common.sh

  $ cat >> $HGRCPATH <<EOF

  > [ui]

  > interactive = true

  > [phases]

  > publish=False

  > [extensions]

  > evolve =

  > topic =

  > EOF

Test

====

  $ hg init $TESTTMP/issue-6028

  $ cd $TESTTMP/issue-6028

create initial commit

  $ echo "0" > 0

  $ hg ci -Am 0

  adding 0

  $ hg up default

  0 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ hg topics a

  marked working directory as topic: a

  $ echo "a" > a

  $ hg ci -Am a

  adding a

  active topic 'a' grew its first changeset

  (see 'hg help topics' for more information)

  $ hg up default

  0 files updated, 0 files merged, 1 files removed, 0 files unresolved

  $ hg topics b

  marked working directory as topic: b

  $ echo "b" > b

  $ hg ci -Am b

  adding b

  active topic 'b' grew its first changeset

  (see 'hg help topics' for more information)

  $ hg up default

  0 files updated, 0 files merged, 1 files removed, 0 files unresolved

  $ hg branch integration

  marked working directory as branch integration

  $ hg merge a

  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  (branch merge, don't forget to commit)

  $ hg ci -m "merged a"

  $ hg merge b

  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  (branch merge, don't forget to commit)

  $ hg ci -m "merged b"

  $ hg up a

  switching to topic a

  0 files updated, 0 files merged, 1 files removed, 0 files unresolved

  $ echo "a bad commit" >> a_bad_commit

  $ hg add a_bad_commit

  $ hg ci -m "a bad commit"

  $ hg up integration

  1 files updated, 0 files merged, 1 files removed, 0 files unresolved

  $ hg merge a

  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  (branch merge, don't forget to commit)

  $ hg ci -m "merged a bad commit"

  $ hg up a

  switching to topic a

  0 files updated, 0 files merged, 1 files removed, 0 files unresolved

  $ echo "aa" >> a

  $ hg ci -m "aa"

  $ hg up integration

  2 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ hg merge a

  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  (branch merge, don't forget to commit)

  $ hg ci -m "merged aa"

  $ hg up b

  switching to topic b

  0 files updated, 0 files merged, 2 files removed, 0 files unresolved

  $ echo "bb" >> b

  $ hg ci -m "bb"

  $ hg up integration

  3 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ hg merge b

  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  (branch merge, don't forget to commit)

  $ hg ci -m "merged bb"

create instability by pruning two changesets, one in a topic, one in a merge

  $ hg prune -r 5:6

  2 changesets pruned

  3 new orphan changesets

  $ hg up 4

  2 files updated, 0 files merged, 1 files removed, 0 files unresolved

start the evolve

  $ hg evolve --update --no-all

  move:[8] merged aa

  atop:[4] merged b

  working directory is now at c920dd828523

evolve creates an obsolete changeset above as 11

  $ hg evolve -r .

  cannot solve instability of c920dd828523, skipping

  cannot solve instability of c920dd828523, skipping