view tests/test-dirstate-backup.t @ 41146:fbd168455b26 stable

histedit: crashing with a more useful error message on empty defaultrev

Before this, `hg --config histedit.defaultrev= histedit` would crash with
File "destutil.py", line 385, in desthistedit
    if revs:
UnboundLocalError: local variable 'revs' referenced before assignment

Differential Revision: https://phab.mercurial-scm.org/D5543

Set up

  $ hg init repo
  $ cd repo

Try to import an empty patch

  $ hg import --no-commit - <<EOF
  > EOF
  applying patch from stdin
  abort: stdin: no diffs found
  [255]

No dirstate backups are left behind

  $ ls .hg/dirstate* | sort
  .hg/dirstate