Actually, the story is not over: it is not definitive to have only one section 
to workaround this issue.
All the packages which are missing from "Packages" have a common point: all of 
them have at least a different value in one of the fields in their "control" 
file than their previous release.

For example, one of gns3-gui_1.4.5 dependencies has changed as compared
to gns3-gui_1.4.4: gns3-net-converter instead of gns3-converter; here
are both control files:

Package: gns3-gui
Priority: extra
Section: net
Installed-Size: 23396
Maintainer: Jean-Christophe Manciot <manciot.jeanchristo...@gmail.com>
Architecture: amd64
Version: 1.4.4-11
Depends: 
gns3-converter,python3,python3-setuptools,python3-pyqt5,python3-pyqt5.qtsvg,python3-pyqt5.qtwebkit,python3-libcloud,python3-requests,python3-paramiko,python3-configobj
Provides: gns3-gui
Description: GNS3 GUI controls the server using a HTTP REST API.

Package: gns3-gui
Priority: extra
Section: net
Installed-Size: 23344
Maintainer: Jean-Christophe Manciot <manciot.jeanchristo...@gmail.com>
Architecture: amd64
Version: 1.4.5-11
Depends: 
gns3-net-converter,python3,python3-setuptools,python3-pyqt5,python3-pyqt5.qtsvg,python3-pyqt5.qtwebkit,python3-libcloud,python3-requests,python3-paramiko,python3-configobj
Provides: gns3-gui
Description: GNS3 GUI controls the server using a HTTP REST API.

In that case, the last package - gns3-gui_1.4.5 - is missing from
'Packages".

Another example: I have changed the section and maintainer values
between virt-viewer_3.0 and virt-viewer_3.1:

Package: virt-viewer
Priority: extra
Section: checkinstall
Installed-Size: 6488
Maintainer: manciot.jeanchristo...@gmail.com
Architecture: amd64
Version: 3.0-11
Depends: openssh-client,desktop-file-utils,spice-client-gtk,libcelt051
Provides: virt-viewer
Description: The virt-viewer application is a lightweight interface for 
interacting with the graphical display of virtualized guest OS.
 It can display VNC or SPICE, and uses libvirt to lookup the graphical 
connection details.

Package: virt-viewer
Priority: extra
Section: utils
Installed-Size: 6620
Maintainer: Jean-Christophe Manciot <manciot.jeanchristo...@gmail.com>
Architecture: amd64
Version: 3.1-11
Depends: openssh-client,desktop-file-utils,spice-client-gtk,libcelt051
Provides: virt-viewer
Description: The virt-viewer application is a lightweight interface for 
interacting with the graphical display of virtualized guest OS.
 It can display VNC or SPICE, and uses libvirt to lookup the graphical 
connection details.

Again, the last version - virt-viewer_3.1 is missing from "Packages".

Obviously, not all fields are affected by this issue; apt-ftparchive
accepts that some of them may change (Installed-Size, Version,...), but
others cannot when they could.

I will change the title of this thread to reflect that.


** Summary changed:

- [apt-utils] Some packages are missing in Packages built by apt-ftparchive
+ [apt-utils] Changing "Section", "Maintainer" or "Depends" (and probably some 
others) fields in a control file makes apt-ftparchive miss the new package in 
"Packages" file.

-- 
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to apt in Ubuntu.
https://bugs.launchpad.net/bugs/1550726

Title:
  [apt-utils] Changing "Section", "Maintainer" or "Depends" (and
  probably some others) fields in a control file makes apt-ftparchive
  miss the new package in "Packages" file.

Status in apt package in Ubuntu:
  New

Bug description:
  On Linux 4.2.0-30-generic #36-Ubuntu SMP Fri Feb 26 00:58:07 UTC 2016 x86_64 
GNU/Linux
  with apt-utils  1.0.10.2 corresponding to previously named issue 
"apt-ftparchive reports wrong file size and checksums in Packages"
  Cf. post #2 which matches the current bug description with apt-utils 1.2.4.

  Generating Packages with (apt-ftparchive.conf is attached below.):
  apt-ftparchive generate --contents=off ./apt-ftparchive.conf
  Generated Packages contains:
  #################################################################
  Package: nemo
  ...
  Installed-Size: 9508
  ...
  Version: 2.8.6-11
  ...
  Filename: dists/wily/system-tools/binary-amd64/nemo_2.8.6-11_amd64.deb
  Size: 1392338
  MD5sum: de162d539df28402f54761f671259278
  SHA1: fb5ebacfc032071d3715dce18640deb649732048
  SHA256: d0c52eb9bd8224e3d876dc6426ccc1ed49f975038152c53faacd5e71e0a19a33
  SHA512: 
e1cc7eb9865c9f3f5a8d4a8f4406862617e285a080bf6c894b3295088a4406a149b53e27ae379c43335a4231e60966f7068412e93173a6e9bfaa8c48b43ac616
  #################################################################

  However, on disk, we have very different file size & checksums:
  ll nemo*
  -rw-r--r-- 1 actionmystique actionmystique 1082324 Feb 27 15:01 
nemo_2.8.6-11_amd64.deb

  md5sum nemo_2.8.6-11_amd64.deb
  68d5c945d9ccd9d3d2807ba46e33cc42  nemo_2.8.6-11_amd64.deb

  If we generate Packages differently with:
  apt-ftparchive packages . > Packages
  Generated Packages contains this time correct file size & checksums:
  #################################################################
  Package: nemo
  ...
  Installed-Size: 5284
  ...
  Version: 2.8.6-11
  ...
  Filename: ./nemo_2.8.6-11_amd64.deb
  Size: 1082324
  MD5sum: 68d5c945d9ccd9d3d2807ba46e33cc42
  SHA1: eecee7a24c20843c15997adcddcd3dad38c9c831
  SHA256: 83451ab9c9975dc7e18d43f2a7d223000c4ee84c9383e82a6461bffef641760a
  SHA512: 
ce715c1d480607e347511562f6d29d10eddb900d2ced3a82d1db08e2bc1a9c24974d3c59cc1e1e83b19ba5dac90d0cc80c7288606e6e3ac06d3551df3550ad09
  #################################################################

  What is very strange is that all other packages in the same folder are
  correctly described by Packages when using the first method for
  generating Packages.

  I have the same issue with another package in another folder.

  I have also uploaded the deb.
  Any suggestion?

  N.B: I can upload the second package if necessary.

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