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Date: Fri, 07 May 2010 14:42:00 -0000
Subject: [Bug fortran/44027]  New: Segfault on internal read  with -malign-double
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From: "Igor dot Katchaev at cern dot ch" <gcc-bugzilla@gcc.gnu.org>
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Results and status of internal read are wrong if -malign-double
option is specified. Seen on (32 bit)
SLC4 gfortran 4.3.3 (i686-pc-linux-gnu),
Ubuntu9 gfortran 4.4.1 (Ubuntu 4.4.1-4ubuntu9),
rhel6 beta (4.4.3-1.el6.i386).

No problem on g77 and gfortran (4.1.2-44.EL4_8.1.i386) on SLC4,
gfortran (4.1.2-48.el5.i386) on slc5.

Under Ubuntu9 gfortran 4.4.1:

% gfortran -malign-double ttest.f && ./a.out
Segmentation fault

Under SLC4 gfortran 4.3.3:

% gfortran -malign-double ttest.f && ./a.out
 Bad input 1 iostat          -1
 ival =      4685168

------ ttest.f ------
      program ttest
      implicit none
      integer ival, ierr
      character*1 str

      str = "1"
      read(str,*,iostat=ierr) ival
      if (ierr.ne.0) then
        write(0,*) 'Bad input ',str,' iostat',ierr
      endif
      write(0,*) 'ival = ', ival
      end
------ EOF ------

Regards, Igor


-- 
           Summary: Segfault on internal read  with -malign-double
           Product: gcc
           Version: 4.4.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: Igor dot Katchaev at cern dot ch
 GCC build triplet: gcc version 4.4.1 (Ubuntu 4.4.1-4ubuntu9)
  GCC host triplet: Linux pcbecn 2.6.31-20-generic #58-Ubuntu SMP Fri Mar 12
                    05:23:0
GCC target triplet: i486-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44027