[Bug c/81306] valgrind error for function warn_for_multistatement_macros in file c-warn.c line 2474

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81306

--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
I've reproduced the issue but don't know what to do about it, it doesn't seem
to be a bug in the warning.  I looks like the macro maps contains holes:

cc1: note: token 77 has x-location == y-location == 0
    78: 0, 0
cc1: note: token 78 has x-location == y-location == 0
    79: 0, 0
cc1: note: token 79 has x-location == y-location == 0
    80: 0, 0
cc1: note: token 80 has x-location == y-location == 0
    81: 0, 0
cc1: note: token 81 has x-location == y-location == 0
    82: 0, 0
cc1: note: token 82 has x-location == y-location == 0
    83: 0, 0
cc1: note: token 83 has x-location == y-location == 0
    84: 0, 0
cc1: note: token 84 has x-location == y-location == 0
    85: 0, 0
cc1: note: token 85 has x-location == y-location == 0
    86: 0, 0
cc1: note: token 86 has x-location == y-location == 0
    87: 0, 0
cc1: note: token 87 has x-location == y-location == 0
    88: 0, 0
cc1: note: token 88 has x-location == y-location == 0
    89: 0, 0
cc1: note: token 89 has x-location == y-location == 0
    90: 0, 0
cc1: note: token 90 has x-location == y-location == 0