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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: Tue, 23 Mar 2021 02:29:12 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D99711

Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|INVALID                     |---
   Last reconfirmed|                            |2021-03-23
             Status|RESOLVED                    |NEW
     Ever confirmed|0                           |1

--- Comment #3 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
(In reply to kargl from comment #2)
> (In reply to Jerry DeLisle from comment #1)
> > F2018 standard section 13.10.3 List-directed Input
> >=20
> > There is a note NOTE 13.29 at the end of the first sub-section 13.10.3.=
1"
> >=20
> > "An allocatable, deferred-length character effective item does not have=
 its
> > allocation status or allocated length changed as a result of list-direc=
ted
> > input."
> >=20
> > This implies that if the strings of the array are not already allocated=
 to a
> > resonable length, for example a string of blanks, then the read will at=
tempt
> > to transfer the file contents into unallocated strings.
>=20
> Doesn't the line
>=20
>  allocate( character(len=3D10) :: cbulist_ru(5) )
>=20
> that is the first executable statement in the program
> allocate an array of 5 strings with length 10?

You are right Steve, tired eyes were "seeing" only the declaration.  In that
case this should be OK and I do see the segfault.  It is likely a front end
issue.=