[Bug bootstrap/87417] [9 regression] Internal error: abort in attr_alt_intersection, at genattrtab.c:2357

[iii at linux dot ibm.com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87417

--- Comment #6 from Ilya Leoshkevich <iii at linux dot ibm.com> ---
Candidate patch here:
  https://gcc.gnu.org/ml/gcc-patches/2018-09/msg01382.html