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From: "jvdelisle at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/99711] Crash when reading an allocated character array
 in namelist
Date: Sat, 27 Mar 2021 03:14:44 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D99711

--- Comment #17 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
(In reply to Jerry DeLisle from comment #16)
> FWIW it also segfaults on:
>=20
>   write(unit=3D6, nml=3Dnam_bu_ru)
>=20
> I have been digging around with gdb in trans-io.c and I can see the cl is
> 0x0 in the sym->ts.u.cl and I can find nothing else accessible at this
> point. I think I am going to have to go back to the "trans" for the alloc=
ate
> which should have the length resolved and stuff it into the sym.

In trans-stmt.c (gfc_trans_allocate (gfc_code * code))

I find:

(gdb) p *code->ext->alloc.ts.u.cl.length.value.integer._mp_d
$41 =3D 10

So it is there and there is code to handle it in that function. However, I =
do
not yet understand the inner workings of frontend to see what the problem i=
s.=