[Reportbug-maint] Bug#849765: reportbug: produces invalid mails when there are long lines

[Adam Borowski]

Package: reportbug
Version: 7.1.1
Severity: normal

Hi!
If the bug report contains an overlong line -- for example, mutt's bug
script includes its configure options, 1017 characters long -- reportbug
will send that unescaped.

The mail will then be rejected by certain MTAs, such as exim in Debian's
unmodified configuration.

Exim happens to do so in an extremely unhelpful way: the rejection message
says just:
Action: failed
Final-Recipient: rfc822;submit at bugs.debian.org
Status: 5.0.0

and the log:
2016-12-30 19:19:55 1cN1mV-0003BB-EP ** submit at bugs.debian.org R=smarthost T=remote_smtp_smarthost: message is too big (transport limit = 1)


Bad error handling by exim aside, reportbug must not send such invalid mails
in the first place.


Meow!
-- Package-specific info:
** Environment settings:
EDITOR="jstar"
EMAIL="kilobyte at angband.pl"
INTERFACE="text"

** /home/kilobyte/.reportbugrc:
reportbug_version "3.17"
mode advanced
ui text

-- System Information:
Debian Release: stretch/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'unstable'), (500, 'testing'), (150, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.9.0+ (SMP w/6 CPU cores)
Locale: LANG=C.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)

Versions of packages reportbug depends on:
ii  apt                1.4~beta2
ii  python3-reportbug  7.1.1
pn  python3:any        <none>

reportbug recommends no packages.

Versions of packages reportbug suggests:
pn  claws-mail                                 <none>
pn  debconf-utils                              <none>
ii  debsums                                    2.1.3
pn  dlocate                                    <none>
pn  emacs23-bin-common | emacs24-bin-common    <none>
ii  exim4                                      4.88-2
ii  exim4-daemon-light [mail-transport-agent]  4.88-2
ii  file                                       1:5.29-2
ii  gir1.2-gtk-3.0                             3.22.5-1
pn  gir1.2-vte-2.91                            <none>
ii  gnupg                                      2.1.17-2
ii  python3-gi                                 3.22.0-2
pn  python3-gtkspellcheck                      <none>
ii  python3-urwid                              1.3.1-2+b1
ii  xdg-utils                                  1.1.1-1

-- no debconf information