[Bug fortran/64244] [4.8/4.9/5 Regression] ICE at class.c:236 when using non_overridable

[janus at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64244

--- Comment #5 from janus at gcc dot gnu.org ---
(In reply to janus from comment #4)
> Here is a draft patch which does this (making the ICE disappear):

Regtests cleanly.