[BISECTED] commit 1266c2219 prevents display refresh with tmux

[Emmanuel Benisty]

Hi,

The following commit breaks display refresh when using tmux:

commit 1266c2219cd346106fb0db2088fdfbe380fcc603
Author: Emanuele Giaquinta <e.giaquinta at glauco.it>
Date:   Sun Jan 13 22:30:47 2013 +0000

    Factor the code to copy a line into a method.

There's at least one more person having this issue (some pictures in
this thread): https://bbs.archlinux.org/viewtopic.php?id=159053

Thanks.
-- Emmanuel