[Bug preprocessor/63834] [5 Regression] unrecognised __has_attribute(xxxx) test causes segv (prevents bootstrap on darwin12).

[emsr at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63834

--- Comment #3 from emsr at gcc dot gnu.org ---
I posted a patch on https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63831 if here
anyone wants to test it before I can.

I'm away from my main machine ATM.