(frappe_five)indictrans@dev:~/webapps/frappe_five/frappe-bench$ bench migrate-to-v5
This will migrate all sites in the bench to version 5. Version 5 is still work in progress and NOT STABLE.
This is irreversible. Do you want to continue? [y/N]: y
Branch v5.0 set up to track remote branch v5.0 from upstream.
Switched to a new branch 'v5.0'
Removing frappe/core/doctype/bulk_email/
Removing frappe/core/doctype/custom_field/
Removing frappe/core/doctype/custom_script/
Removing frappe/core/doctype/customize_form/
Removing frappe/core/doctype/customize_form_field/
Removing frappe/core/doctype/email_alert/
Removing frappe/core/doctype/email_alert_recipient/
Removing frappe/core/doctype/event/
Removing frappe/core/doctype/event_role/
Removing frappe/core/doctype/event_user/
Removing frappe/core/doctype/letter_head/
Removing frappe/core/doctype/notification_count/
Removing frappe/core/doctype/outgoing_email_settings/
Removing frappe/core/doctype/print_format/
Removing frappe/core/doctype/print_settings/
Removing frappe/core/doctype/property_setter/
Removing frappe/core/doctype/standard_reply/
Removing frappe/core/doctype/todo/
Removing frappe/core/doctype/workflow/
Removing frappe/core/doctype/workflow_action/
Removing frappe/core/doctype/workflow_document_state/
Removing frappe/core/doctype/workflow_state/
Removing frappe/core/doctype/workflow_transition/
Removing frappe/templates/website_group/
Removing frappe/utils/email_lib/
Removing frappe/website/doctype/post/
Removing frappe/website/doctype/user_vote/
Removing frappe/website/doctype/website_group/
Removing frappe/website/doctype/website_route_permission/
Removing frappe/widgets/
error: pathspec 'v5.0' did not match any file(s) known to git.
Error: None
Traceback (most recent call last):
  File "/home/indictrans/webapps/verve/bin/bench", line 9, in <module>
    load_entry_point('bench==0.1', 'console_scripts', 'bench')()
  File "/home/indictrans/webapps/frappe_five/bench-repo/bench/cli.py", line 38, in cli
    return bench()
  File "/home/indictrans/webapps/frappe_five/local/lib/python2.7/site-packages/click/core.py", line 610, in __call__
    return self.main(*args, **kwargs)
  File "/home/indictrans/webapps/frappe_five/local/lib/python2.7/site-packages/click/core.py", line 590, in main
    rv = self.invoke(ctx)
  File "/home/indictrans/webapps/frappe_five/local/lib/python2.7/site-packages/click/core.py", line 936, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/home/indictrans/webapps/frappe_five/local/lib/python2.7/site-packages/click/core.py", line 782, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/home/indictrans/webapps/frappe_five/local/lib/python2.7/site-packages/click/core.py", line 416, in invoke
    return callback(*args, **kwargs)
  File "/home/indictrans/webapps/frappe_five/bench-repo/bench/cli.py", line 208, in _migrate_to_v5
    migrate_to_v5(bench=bench)
  File "/home/indictrans/webapps/frappe_five/bench-repo/bench/migrate_to_v5.py", line 14, in migrate_to_v5
    checkout_v5(repo, bench=bench)
  File "/home/indictrans/webapps/frappe_five/bench-repo/bench/migrate_to_v5.py", line 47, in checkout_v5
    exec_cmd("git checkout v5.0", cwd=cwd)
  File "/home/indictrans/webapps/frappe_five/bench-repo/bench/utils.py", line 61, in exec_cmd
    subprocess.check_call(cmd, cwd=cwd, shell=True)
  File "/usr/lib/python2.7/subprocess.py", line 540, in check_call
    raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command 'git checkout v5.0' returned non-zero exit status 1
(frappe_five)indictrans@dev:~/webapps/frappe_five/frappe-bench$