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Date: Mon, 11 Jan 2021 16:18:56 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D93524

--- Comment #1 from Tobias Burnus <burnus at gcc dot gnu.org> ---
Also related to this issue:
https://gcc.gnu.org/pipermail/fortran/2021-January/055581.html:

In my understanding (see linked email and spec quote in comment 0),
CFI_type_signed_char is an integer type =E2=80=93 and, hence, it should not=
 be handled
at the following place =E2=80=93 as pointed out by Harris Snyder in that em=
ail:

'CFI_establish' in libgfortran/runtime/ISO_Fortran_binding.c, circa line 34=
8:

  if (type =3D=3D CFI_type_char || type =3D=3D CFI_type_ucs4_char ||
      type =3D=3D CFI_type_signed_char || type =3D=3D CFI_type_struct ||
      type =3D=3D CFI_type_other)
    dv->elem_len =3D elem_len;


The value is later used for the stride multiplier (sm) =E2=80=93 hence, it =
causes
problems if it is set wrongly (to 0).

TESTCASE: See linked email.=