We don't use xmalloc or xrealloc in .y files, as explained at the top of
every .y file.   When I pointed it out to Tom recently, he pointed
out these two left overs.

We don't actually s/free/xfree/, but, there are many other
references to free, and it's just, IMHO best to be consistent, to
prevent confusion; plus, if it made a difference, it should be fixed
in Makefile.in, IMVHO.

Anything I'm missing preventing me from applying this as obvious?

-- 
Pedro Alves