[Bug 882084] Re: apt-extracttemplates(1) prints inappropriate \r characters in unattended-upgrades

[Daniel Richard G.]

Happened again this morning. My Web-mail client gave me the same empty
message with a single attachment containing the upgrade log; I've
attached the file here.

The common thread seems to be that this only occurs with large upgrades
---smaller upgrades don't take as much time to extract templates from
the packages, so they don't print the percent-progress indicator with \r
characters.

** Attachment added: "Attachment1.txt"
   https://bugs.launchpad.net/ubuntu/+source/apt/+bug/882084/+attachment/2605224/+files/Attachment1.txt

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https://bugs.launchpad.net/bugs/882084

Title:
  apt-extracttemplates(1) prints inappropriate \r characters in
  unattended-upgrades

Status in “apt” package in Ubuntu:
  New

Bug description:
  This concerns apt-utils 0.8.16~exp5ubuntu13 in Oneiric, but may
  potentially be an unattended-upgrades bug.

  This morning, I received an unattended-updates log message in my work
  mail. Curiously, Outlook Web Access did not display the log text, but
  instead gave me a single .bin file to download. This .bin file
  contained the plain text of the upgrade log, with the exception of the
  following bit, as seen in less(1):

  ----8<----
   system-config-printer-gnome system-config-printer-udev tzdata 
   tzdata-java ubufox update-manager update-manager-core vinagre 
   xul-ext-ubufox 
  Packages with upgradable origin but kept back:
   software-center 

  Package installation log:
  ^MExtracting templates from packages: 54%^MExtracting templates from packages: 100%
  Preconfiguring packages ...
  (Reading database ... 225967 files and directories currently installed.)
  Preparing to replace libcups2 1.5.0-8ubuntu1 (using .../libcups2_1.5.0-8ubuntu3_amd64.deb) ...
  ---->8----

  I've never seen the "Extracting templates from packages" line in an
  unattended-upgrades mail message before. I suspect apt-
  extracttemplates(1) may be thinking it's writing output to a terminal,
  and not a regular file.

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