[Bug c/64167] [4.9 Regression] bootstrap error: segv in c parser

[danglin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64167

--- Comment #3 from John David Anglin <danglin at gcc dot gnu.org> ---
Introduced in r218208 on 4.9:
https://gcc.gnu.org/ml/gcc-cvs/2014-12/msg00015.html

Also present on trunk.