screen segfaults if using layout saving with "-D -m"

[Alistair Buxton]

Binary package hint: screen

To reproduce:

echo "layout save foo\nlayout autosave" > tmp-screenrc
screen -c tmp-screenrc -D -m

This segfaults every time because layout saving attempts to access a tty and with using "-d -m" or "-D -m" screen starts detached and does not have a tty. This bug affects mainly byobu because it has layout saving enabled by default. Standard vanilla screen does not.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: screen 4.0.3-14ubuntu7
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Sat May 21 20:38:40 2011
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110422)
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: screen
UpgradeStatus: No upgrade log present (probably fresh install)