[Bug other/69554] [6 Regression] Multi-location diagnostics writes too many lines

[dmalcolm at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69554

--- Comment #17 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Candidate patch posted here:
  https://gcc.gnu.org/ml/gcc-patches/2016-02/msg00646.html