Re: [PATCH] fetch: report local storage errors in status table

Jeff King [off-list ref] writes:

Previously, if there was an error while storing a local
tracking ref, the low-level functions would report an error,
but fetch's status output wouldn't indicate any problem.
E.g., imagine you have an old "refs/remotes/origin/foo/bar" but
upstream has deleted "foo/bar" in favor of a new branch
"foo". You would get output like this:

  error: there are still refs under 'refs/remotes/origin/foo'
  From $url_of_repo
   * [new branch]      foo        -> origin/foo

With this patch, the output takes into account the status of
updating the local ref:

  error: there are still refs under 'refs/remotes/origin/foo'
  From $url_of_repo
   ! [new branch]      foo        -> origin/foo  (unable to update local ref)

Signed-off-by: Jeff King <redacted>

Makes sense --- thanks.  This is something we can have automated tests,
isn't it?