[Bug c/70281] valgrind error in can_be_stored_compactly_p (line-map.c:148)

[dmalcolm at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70281

--- Comment #3 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Candidate patch posted here:
  https://gcc.gnu.org/ml/gcc-patches/2016-03/msg01099.html