[Bug fortran/78492] New: [OOP] Compiler segfault with non_overridable function in generic interface

["perini at wisc dot edu" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78492

            Bug ID: 78492
           Summary: [OOP] Compiler segfault with non_overridable function
                    in generic interface
           Product: gcc
           Version: 6.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: perini at wisc dot edu
  Target Milestone: ---

Created attachment 40128
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=40128&action=edit
Minimal program to test non_overridable functions in generic type-bound set

Hi, 

As from object, I get internal compiler error (segfault) with both gcc 5.3.0
and gcc 6.1.0 in this case: 

In a derived type (either polymorphic or not), there is a generic type-bound
procedure interface where any of the procedures are listed as
"non_overridable". 
If the code calls any of the individual specific procedures, no error occurs.
If the code calls the generic interface, I get compiler segmentation fault. 

I am attaching a minimal example that reproduces this behavior for both gcc
5.3.0 and 6.1.0. 

Thanks, 
Federico