[Bug fortran/86328] [8/9 Regression] Runtime segfault reading an allocatable class(*) object in allocate statements

[janus at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86328

--- Comment #5 from janus at gcc dot gnu.org ---
(In reply to janus from comment #4)
> Bisection shows that this regression was introduced by Paul's r251949 on
> 2017-09-10.

I could verify that reverting the expr.c part of that commit does not cure the
bug, so the problematic part must be somewhere in the trans* changes.