https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89766
--- Comment #4 from Rimvydas (RJ) <rimvydas.jas at gmail dot com> --- @Martin: Yes, ICE happens for valid code too only if -fchecking=1. Reduced cases are invalid and rejected by 9.0.1 20190319 and 8.2.1 20181127. However 8.3.1 20190319 accepts them even for -fchecking=0.
