Bug#764503: apt: "apt-get update" fails after downgrading from 1.1~exp4 to 1.0.9.2: E: Could not open file /var/lib/apt/lists/ftp.ch.debian.org_debian_dists_sid_main_source_Sources.IndexDiff - open (2: No such file or directory)

[Axel Beckert <abe@debian.org>]

Package: apt
Version: 1.1~exp4
Severity: minor
Control: affects -1 aptitude

Dear APT Developers,

since apt 1.1~exp4 caused some malfunctioning with aptitude (mostly
related to "aptitude update" and "aptitude -u"), I decided to downgrade
apt to 1.0.9.2 again.

But since then, "apt-get update" fails as follows (and aptitude already
did so before downgrading, too):

# apt-get update
Hit http://ftp.ch.debian.org sid InRelease
Hit http://ftp.ch.debian.org testing InRelease
Hit http://ftp.ch.debian.org experimental InRelease
Hit http://ftp.ch.debian.org sid/main Sources/DiffIndex
E: Could not open file /var/lib/apt/lists/ftp.ch.debian.org_debian_dists_sid_main_source_Sources.IndexDiff - open (2: No such file or directory)

The following sufficed to fix the issue:

# rm /var/lib/apt/lists/ftp.ch.debian.org_debian_dists_*
# apt-get update

-- Package-specific info:

-- (/etc/apt/preferences present, but not submitted) --


-- (/etc/apt/sources.list present, but not submitted) --

The following information is from _after_ the downgrade to 1.0.9.2:

-- System Information:
Debian Release: jessie/sid
  APT prefers unstable
  APT policy: (990, 'unstable'), (600, 'testing'), (110, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 3.16-trunk-amd64 (SMP w/4 CPU cores)
Locale: LANG=C.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages apt depends on:
ii  debian-archive-keyring  2014.1
ii  gnupg                   1.4.18-4
ii  libapt-pkg4.12          1.0.9.2
ii  libc6                   2.19-11
ii  libgcc1                 1:4.9.1-16
ii  libstdc++6              4.9.1-16

apt recommends no packages.

Versions of packages apt suggests:
ii  apt-doc     1.0.9.2
ii  aptitude    0.6.11-1
ii  dpkg-dev    1.17.16
ii  python-apt  0.9.3.10
ii  synaptic    0.81.2
ii  wajig       2.14

-- Configuration Files:
/etc/apt/apt.conf.d/01autoremove changed:
APT
{
  NeverAutoRemove
  {
	"^firmware-linux.*";
	"^linux-firmware$";
  };
  VersionedKernelPackages
  {
	# linux kernels
	"linux-image";
	"linux-headers";
	"linux-image-extra";
	"linux-signed-image";
	# kfreebsd kernels
	"kfreebsd-image";
	"kfreebsd-headers";
	# hurd kernels
	"gnumach-image";
	# (out-of-tree) modules
	".*-modules";
	".*-kernel";
	"linux-backports-modules-.*";
        # tools
        "linux-tools";
  };
  Never-MarkAuto-Sections
  {
  };
};


-- no debconf information