Bug#879864: gcc-5: version mismatch

[Vincent Lefevre <vincent@vinc17.net>]

Package: gcc-5
Version: 5.5.0-2
Severity: normal

zira:~> gcc-5 --version
gcc-5 (Debian 5.5.0-2) 5.4.1 20171010
[...]

The package version is 5.5.0-2, but the displayed version is 5.4.1.
This is not consistent.

-- System Information:
Debian Release: buster/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'stable-updates'), (500, 'unstable'), (500, 'testing'), (500, 'stable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 4.13.0-1-amd64 (SMP w/8 CPU cores)
Locale: LANG=POSIX, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=POSIX (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages gcc-5 depends on:
ii  binutils      2.29.1-6
ii  cpp-5         5.5.0-2
ii  gcc-5-base    5.5.0-2
ii  libc6         2.24-17
ii  libcc1-0      7.2.0-11
ii  libgcc-5-dev  5.5.0-2
ii  libgcc1       1:7.2.0-11
ii  libgmp10      2:6.1.2+dfsg-1.1
ii  libisl15      0.18-1
ii  libmpc3       1.0.3-2
ii  libmpfr4      3.1.6-1
ii  libstdc++6    7.2.0-11
ii  zlib1g        1:1.2.8.dfsg-5

Versions of packages gcc-5 recommends:
ii  libc6-dev  2.24-17

Versions of packages gcc-5 suggests:
ii  gcc-5-doc         5.3.0-2
ii  gcc-5-locales     5.5.0-2
ii  gcc-5-multilib    5.5.0-2
pn  libasan2-dbg      <none>
pn  libatomic1-dbg    <none>
pn  libcilkrts5-dbg   <none>
pn  libgcc1-dbg       <none>
pn  libgomp1-dbg      <none>
pn  libitm1-dbg       <none>
pn  liblsan0-dbg      <none>
pn  libmpx0-dbg       <none>
pn  libquadmath0-dbg  <none>
pn  libtsan0-dbg      <none>
pn  libubsan0-dbg     <none>

-- no debconf information