[Bug preprocessor/69664] [6 Regression] column info is lost

[dmalcolm at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69664

--- Comment #4 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Candidate patch posted here:
  https://gcc.gnu.org/ml/gcc-patches/2016-02/msg00372.html