[screen-devel] Current screen HEAD can't reattach to a detached screen 4.0.3

[Axel Beckert]

Hi,

I'm currently preparing an upload of the current screen HEAD to Debian
(either Unstable or Experimental, not yet decided) and I noticed that,
if I have a screen 4.0.3 (as currently in Debian Stable/Unstable) is
running, I can't reattach to that with the new screen 4.1.0 snapshot,
it just hangs until I kill it with "kill -TERM" as Ctrl-C does not
help.

As for me the common way to dist-upgrade Debian or Ubuntu boxes
(especially remote servers) is to run the whole process inside a
screen, this is a quite critical issue. So I wonder:

Is this issue known? Not circumventable? An unexpected bug? Anyone has
an idea where this comes from? Or does it not happen at all with vanilla
screen versions?

I tried to strace "screen -r" to find any differences, but
interestingly it behaves differently when being traced (bails out with
claiming /var/run/screen has wrong permissions or so) than when not.

                Kind regards, Axel
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