[Bug 1707979] Fwd: Re: [beyondgrep/ack2] Ubuntu Artful doesn't contain ack (nor ack-grep) (#652) [origin: notifications at github.com]

[Axel Beckert]

The following comment by the main ack upstream developer in the
according upstream ticket may give a hint where to look for the
failure reason:

----- Forwarded message from Andy Lester (https://github.com/beyondgrep/ack2/issues/652#issuecomment-350527181) -----
Here's something interesting: Many of the tests I see at https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-artful/artful/amd64/a/ack/20171024_160017_5333d@/log.gz are showing `-` as filenames found in tests where actual filenames are expected, like so:

```
                #   Failed test 'File on command line is always searched'
                #   at t/Util.pm line 412.
                # +----+-------+---------------------------------+
                # | Elt|Got    |Expected                         |
                # +----+-------+---------------------------------+
                # |   0|[      |[                                |
                # *   1|  '-'  |  't/swamp/#emacs-workfile.pl#'  *
                # |   2|]      |]                                |
                # +----+-------+---------------------------------+
                # actual[
                #   '-'
                # ]
                # expected[
                #   't/swamp/#emacs-workfile.pl#'
                # ]
                # Looks like you failed 1 test of 1.
```

It's a pretty consistent pattern happening throughout.  Maybe there's something in how the tests get run that confuse STDIN with the filesystem?
----- End forwarded message -----

So does the autopkgtest infrastructure in Ubuntu run on a rather
exotic file system which might result in tools regarding files as
STDIN?

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https://bugs.launchpad.net/bugs/1707979

Title:
  No ack or ack-grep in artful.

Status in ack package in Ubuntu:
  Confirmed
Status in autopkgtest package in Ubuntu:
  Confirmed

Bug description:
  There is no ack or ack-grep package in artful.

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