[Bug-tar] bug: --xform is silently ignored with --concatenate

[Florent Becker]

Hi,

I think the following behaviour of tar, when --transform is used with
--concatenate, to be a bug:

$ tar -tf a.tar
dir/a
$ tar -tf b.tar
b
$ tar -f a.tar --concatenate b.tar --transform s,^,dir/,
$ tar -tf a.tar
dir/a
b

I'd expect either --transform to operate on b.tar (that would be the
most useful), or at least, to report an error "--transform cannot be
used with --concatenate".

Friendly,

--
Florent

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