Bug#862739: devscripts: Undefined subroutine in debchange

[ZOVITS Adam]

Package: devscripts
Version: 2.15.3+deb8u1
Severity: important

Dear Maintainer,

I apologize in advance for any mistakes I might have made during the reporting of this bug. The following is the output generated by the reportbug command, but the system where the bug was observed has no internet connection so I'm sending the results from my work PC. Hope I haven't forgotten anything important, in any case, I'm happy to assist in debugging. Thank you all for your hard work!

* Reproduction:
The problem can be reproduced by running debchange without any parameters and saving the generated changelog (even without any changes).

* The complete error message:
Undefined subroutine &main::copy called at /usr/bin/debchange line 1575.

* Tried solution:
Using different arguments did not help (resulted in the exact same error message). Removing and reinstalling devscripts and perl resulted in no change.

* Expected outcome:
debchange functions correctly without failure messages.

-- Package-specific info:

--- /etc/devscripts.conf ---

--- ~/.devscripts ---
Not present

-- System Information:
Debian Release: 8.8
  APT prefers stable
  APT policy: (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 3.16.0-4-amd64 (SMP w/2 CPU cores)
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages devscripts depends on:
ii  dpkg-dev     1.17.27
ii  libc6        2.19-18+deb8u9
ii  perl         5.20.2-3+deb8u6
ii  python3      3.4.2-2
pn  python3:any  <none>

Versions of packages devscripts recommends:
pn  at                          <none>
pn  dctrl-tools                 <none>
pn  debian-keyring              <none>
pn  dput | dupload              <none>
pn  equivs                      <none>
ii  fakeroot                    1.20.2-1
ii  file                        1:5.22+15-2+deb8u3
ii  gnupg                       1.4.18-7+deb8u3
pn  libdistro-info-perl         <none>
pn  libencode-locale-perl       <none>
pn  libjson-perl                <none>
pn  liblwp-protocol-https-perl  <none>
pn  libparse-debcontrol-perl    <none>
pn  libsoap-lite-perl           <none>
pn  liburi-perl                 <none>
pn  libwww-perl                 <none>
pn  lintian                     <none>
ii  man-db                      2.7.0.2-5
ii  patch                       2.7.5-1
pn  patchutils                  <none>
pn  python3-debian              <none>
pn  python3-magic               <none>
ii  sensible-utils              0.0.9
pn  strace                      <none>
pn  unzip                       <none>
pn  wdiff                       <none>
ii  wget                        1.16-1+deb8u2
ii  xz-utils                    5.1.1alpha+20120614-2+b3

Versions of packages devscripts suggests:
pn  bsd-mailx | mailx            <none>
pn  build-essential              <none>
pn  cvs-buildpackage             <none>
pn  debbindiff                   <none>
pn  devscripts-el                <none>
pn  gnuplot                      <none>
ii  gpgv                         1.4.18-7+deb8u3
pn  libauthen-sasl-perl          <none>
pn  libfile-desktopentry-perl    <none>
pn  libnet-smtp-ssl-perl         <none>
pn  libterm-size-perl            <none>
ii  libtimedate-perl             2.3000-2
pn  libyaml-syck-perl            <none>
pn  mutt                         <none>
ii  openssh-client [ssh-client]  1:6.7p1-5+deb8u3
pn  svn-buildpackage             <none>
pn  w3m                          <none>

-- no debconf information