The mhy says this fixes it

Signed-off-by: Joerg Jaspert <joerg@debian.org>

diff --git a/dak/generate_packages_sources.py b/dak/generate_packages_sources.py
index cf17ed908a46562d8e0e7d9c0662e96ec0ed0cca..7398f67078bf37f6e6b31d0ab647f9ff6dfbf5eb 100755 (executable)
--- a/dak/generate_packages_sources.py
+++ b/dak/generate_packages_sources.py
@@ -298,7 +298,7 @@ tree "dists/proposed-updates/main"
         if arch != 'source':
             if arch == 'hurd-i386' and suite == 'experimental':
                 pass
-            else:
+            elif apt_trees["di"].has_key(suite):
                 if arch == "amd64":
                     os.write(ac_fd, apt_trees["di"][suite] %
                              {'arch': arch, 'contentsline': 'Contents "$(DIST)/../Contents-udeb";'})