[Bug 1553097] Re: latest LXC breaks autopkgtest's LXC runner

[Martin Pitt]

This is indeed a regression in lxc-attach. Until 2.0.0~rc1 this DTRT:

$ sudo lxc-attach -n adt-virt-lxc-lbmmpf -- sh -c 'echo ERR>&2' >/dev/null
ERR

but not any more with rc5:
$ sudo lxc-attach -n a -- sh -c 'echo ERR>&2' >/dev/null
# (no output)

** Summary changed:

- latest LXC breaks autopkgtest's LXC runner
+ lxc-attach does not output stderr any more if stdout is redirected

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Title:
  lxc-attach does not output stderr any more if stdout is redirected

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