Bug#1121751: cups-daemon: breaks printing in GNOME

[Raphaël Hertzog <raphael@freexian.com>]

Package: cups-daemon
Version: 2.4.15-1
Severity: grave
Justification: renders package unusable
X-Debbugs-Cc: pkg-gnome-maintainers@lists.alioth.debian.org

When I upgraded to this version of cups-daemon today, printing stopped
working in all GNOME applications (it worked in 2.4.14). The printing
dialog would simply not open and the application gets stuck until it's
killed.

While stracing the application, and replicating the issue, it ends up with
an infinite loop of:
poll([{fd=22, events=POLLIN}], 1, 0)    = 1 ([{fd=22, revents=POLLIN}])

Where fd=22 is the socket /run/cups/cups.sock.

Maybe the underlying bug is in the GNOME stack but from where I stand
retrograding cups to the version in stable fixed the issue for me so I'm
filing the issue against cups for now, but I'm ccing
pkg-gnome-maintainers@lists.alioth.debian.org to draw their attention to
this issue.

Thank you in advance!