[rt.cpan.org #111455] unable to use -x and -u with pp

Thu Jan 28 04:48:39 2016: Request 111455 was acted upon.
Transaction: Correspondence added by RSCHUPP
       Queue: PAR-Packer
     Subject: unable to use -x and -u with pp
   Broken in: (no value)
    Severity: (no value)
       Owner: Nobody
  Requestors: [email protected]
      Status: open
 Ticket <URL: https://rt.cpan.org/Ticket/Display.html?id=111455 >


On 2016-01-27 14:59:36, SLAFFAN wrote:
> The patch makes the failure go away.

Thanks for testing, will be in the next release.

> The used once warnings still remain, but they appear harmless.

Yes, essentially we're doing

$ perl .../utf8_heavy.pl

which produces the same warnings.

> Someone at a later date might use -M and want all the associated
> dependencies, but that could lead to all sorts of issues in itself.

I don't think we're loosing anything here: 
for "pp -M Foo::Bar ..." we still do

- scan Foo/Bar.pm
- add any %Preload dependencies of Foo/Bar.pm to the list of dependencies

If "-x" was also specified, we still run Foo/Bar.pm (pointless, 
but harmless except for possible warnings).

But we don't:

- scan all the %Preload dependencies of Foo/Bar.pm explicitly, but AFAICT
  Module::ScanDeps will scan them anyway
- with "-x" run all the %Preload dependencies of Foo/Bar.pm (even more
  pointless, and harmful as they might include files that aren't Perl source)

Cheers, Roderich