From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugzilla@gcc.gnu.org>
Received: by sourceware.org (Postfix, from userid 48)
	id 9F56F3858CDB; Thu,  9 Mar 2023 11:57:48 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 9F56F3858CDB
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1678363068;
	bh=ddiNYQmAFbVQU2VpCgJffd0qPwfHKQBrgvDn14noXjA=;
	h=From:To:Subject:Date:From;
	b=RA98M0K6PSGL04G8wRtm6xuSiP3nAtjaOvE+P86agGBEeS93vkkQZbIat1d+H27i8
	 6eXK413JHe4S31mtr+n55n3vexIb+oFQZYEKO0xqKeGEhm5Ezwdkpt1eaXOhfB2xWJ
	 1C3W5B8y3dKEXyv/SicktIlw60GvNMN4xfnRq/rI=
From: "urbanjost at comcast dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/109080] New: A write of a NAMELIST group containing an
 allocatable array is incorrect
Date: Thu, 09 Mar 2023 11:57:48 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: fortran
X-Bugzilla-Version: 11.1.0
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: urbanjost at comcast dot net
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status
 bug_severity priority component assigned_to reporter target_milestone
Message-ID: <bug-109080-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
List-Id: <gcc-bugs.sourceware.org>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109080

            Bug ID: 109080
           Summary: A write of a NAMELIST group containing an allocatable
                    array is incorrect
           Product: gcc
           Version: 11.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: urbanjost at comcast dot net
  Target Milestone: ---

Sometimes it runs and writes out ALINES incorrectly,
and sometimes the same executable segfaults.

program gnubug
implicit none
character(len=3D2) :: lines(3)
character(len=3D2),allocatable :: blines(:)=20
character(len=3D:),allocatable :: alines(:)=20
namelist/args/lines, alines, blines
   lines  =3D ['Xx','Yy','Zz']
   alines =3D ['Xx','Yy','Zz']
   blines =3D ['Xx','Yy','Zz']
   write(*,nml=3Dargs,delim=3D'quote')
end program gnubug

gfortran xx.f90
$ ./a.out
&ARGS
 LINES=3D"Xx","Yy","Zz",
 ALINES=3D 3*"Xx",
 BLINES=3D"Xx","Yy","Zz",
 /

./a.out
Program received signal SIGSEGV: Segmentation fault - invalid memory refere=
nce.

Backtrace for this error:
#0  0x1516241f9700 in ???
#1  0x1516241f88a5 in ???
#2  0x15162402908f in ???
        at
/build/glibc-SzIz7B/glibc-2.31/signal/../sysdeps/unix/sysv/linux/x86_64/sig=
action.c:0
#3  0x151624173590 in ???
        at ../sysdeps/x86_64/multiarch/memcmp-sse4.S:72
#4  0x15162443c187 in ???
#5  0x15162443cece in ???
#6  0x151624432974 in ???
#7  0x151624432d01 in ???
#8  0x55c8983f77d8 in ???
#9  0x55c8983f7821 in ???
#10  0x15162400a082 in __libc_start_main
        at ../csu/libc-start.c:308
#11  0x55c8983f710d in ???
#12  0xffffffffffffffff in ???=