[Bug fortran/124161] [14/15/16 Regression] ICE in fold_convert_loc with submodule polymorphic TBP dispatch

[anlauf at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124161

--- Comment #4 from anlauf at gcc dot gnu.org ---
(In reply to Josef Melcr from comment #3)
> Created attachment 63726 [details]
> cvised testcase
> 
> Doesn't produce the false positive warning

This example ICEs for me also with 14.3.1, so I doubt that the blamed commit
is reponsible.

The submodule seems essential for the ICE to occur.