diff -Nru sbuild-0.65.2/debian/changelog sbuild-0.65.2/debian/changelog
--- sbuild-0.65.2/debian/changelog	2016-01-11 12:22:15.000000000 +0000
+++ sbuild-0.65.2/debian/changelog	2016-02-18 14:37:43.000000000 +0000
@@ -1,3 +1,10 @@
+sbuild (0.65.2-1ubuntu2~ubuntu14.04.1~ppa8) trusty; urgency=medium
+
+  * copy-dummy-archive.patch: Sbuild::ResolverBase: use copy: for dummy
+    archive.  Fixes launchpad-buildd crashes when analysing dep-waits.
+
+ -- Colin Watson <cjwatson@ubuntu.com>  Thu, 18 Feb 2016 14:37:39 +0000
+
 sbuild (0.65.2-1ubuntu2~ubuntu14.04.1~ppa7) trusty; urgency=medium
 
   * Install Build-Depends-Arch in the correct situations (LP: #1516336).
diff -Nru sbuild-0.65.2/debian/patches/copy-dummy-archive.patch sbuild-0.65.2/debian/patches/copy-dummy-archive.patch
--- sbuild-0.65.2/debian/patches/copy-dummy-archive.patch	1970-01-01 00:00:00.000000000 +0000
+++ sbuild-0.65.2/debian/patches/copy-dummy-archive.patch	2016-02-18 14:34:45.000000000 +0000
@@ -0,0 +1,26 @@
+Description: Sbuild::ResolverBase: use copy: for dummy archive
+ We used to use file: URIs for sbuild's dummy archive, but recent versions
+ of apt put symlinks in /var/lib/apt/lists/ if we do that, which means that
+ those symlinks become broken as soon as we remove the dummy archive.
+ sbuild itself is OK with this, but launchpad-buildd tries to read
+ /var/lib/apt/lists/*_Packages in order to do dep-wait analysis after
+ failures, and that fails if there are broken symlinks there.  It's easy
+ enough to avoid this problem by using copy: URIs instead, so let's do that.
+Origin: backport, https://anonscm.debian.org/cgit/buildd-tools/sbuild.git/commit/?id=e2d63ebc20c8d2ef5d96db83828087505928895f
+Last-Update: 2016-02-18
+
+Index: b/lib/Sbuild/ResolverBase.pm
+===================================================================
+--- a/lib/Sbuild/ResolverBase.pm
++++ b/lib/Sbuild/ResolverBase.pm
+@@ -1013,8 +1013,8 @@
+     # Write a list file for the dummy archive if one not create yet.
+     if (! -f $dummy_archive_list_file) {
+         my ($tmpfh, $tmpfilename) = tempfile(DIR => $session->get('Location') . "/tmp");
+-        print $tmpfh 'deb file://' . $session->strip_chroot_path($dummy_archive_dir) . " ./\n";
+-        print $tmpfh 'deb-src file://' . $session->strip_chroot_path($dummy_archive_dir) . " ./\n";
++        print $tmpfh 'deb copy://' . $session->strip_chroot_path($dummy_archive_dir) . " ./\n";
++        print $tmpfh 'deb-src copy://' . $session->strip_chroot_path($dummy_archive_dir) . " ./\n";
+ 
+         for my $repospec (@{$self->get_conf('EXTRA_REPOSITORIES')}) {
+             print $tmpfh "$repospec\n";
diff -Nru sbuild-0.65.2/debian/patches/series sbuild-0.65.2/debian/patches/series
--- sbuild-0.65.2/debian/patches/series	2016-01-11 12:21:42.000000000 +0000
+++ sbuild-0.65.2/debian/patches/series	2016-02-18 14:37:30.000000000 +0000
@@ -5,3 +5,4 @@
 nolog-autoflush-stdout.patch
 backport-dpkg-deps.patch
 fix-build-depends-arch.patch
+copy-dummy-archive.patch