[Bug fortran/84674] [12/13/14/15 Regression] Derived type name change makes a program segfault, removing non_overridable helps

[pault at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84674

Paul Thomas <pault at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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           Assignee|unassigned at gcc dot gnu.org      |pault at gcc dot gnu.org

--- Comment #16 from Paul Thomas <pault at gcc dot gnu.org> ---
Created attachment 59667
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=59667&action=edit
Fix for this PR

The attached fixes the problem. The compiler doesn't like extensions that are
completely empty!