http://mercurial.selenic.com/bts/issue1175

  $ hg init

  $ touch a

  $ hg ci -Am0

  adding a

  $ hg mv a a1

  $ hg ci -m1

  $ hg co 0

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

  $ hg mv a a2

  $ hg up

  note: possible conflict - a was renamed multiple times to:

   a2

   a1

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

  $ hg ci -m2

  $ touch a

  $ hg ci -Am3

  adding a

  $ hg mv a b

  $ hg ci -Am4 a

  $ hg ci --debug --traceback -Am5 b

  b

   b: searching for copy revision for a

   b: copy a:b80de5d138758541c5f05265ad144ab9fa86d1db

  $ hg verify

  checking changesets

  checking manifests

  crosschecking files in changesets and manifests

  checking files

  4 files, 6 changesets, 4 total revisions

  $ hg export --git tip

  # HG changeset patch

  # User test

  # Date 0 0

  5

  diff --git a/b b/b

  new file mode 100644