[Bug rtl-optimization/90813] [10 regression] gfortran.dg/proc_ptr_51.f90 fails (SIGSEGV) after 272084

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90813

--- Comment #24 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Is that disallowed?  Is there any way to prevent that from happening, in
general?