[Bug fortran/94660] Wrong subroutine called at runtime than the one called in the source code with deferred subroutines

[gnu.gcc.detection675 at passmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94660

Jeff Hole <gnu.gcc.detection675 at passmail dot com> changed:

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--- Comment #4 from Jeff Hole <gnu.gcc.detection675 at passmail dot com> ---
Created attachment 56807
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=56807&action=edit
clue: combining modules into a single file gives expected results

Here's an interesting clue: the correct results occur when all the modules are
stored in the same source file (note, all modules are still separate, just in
the same file).

This is certainly not a solution, but it does provide a clue to the problem, as
well as and a way to get things working the way you want. Ultimately, it is
necessary that this works across separate module source files so that we
separate compilation steps and enable extensions of these types beyond the
single source file.

I compiled with gfortran:
    GNU Fortran (GCC) 10.3.1 20210422 (Red Hat 10.3.1-1)

I attached tarball "buginnspg-clue.tar".