The attached code generates a segfault when compiled with -fbounds-check, even
if there is no bounds violation nor any other error I can see. (indeed if it's
wrong code I'd love to learn why).
Session log:
[EMAIL PROTECTED] bugtest]$ gfortran -v
Using built-in specs.
Target: i686-pc-linux-gnu
Configured with: ../gcc-4.2-20061107/configure --prefix=/usr/local/gcc42
--with-
mpfr-dir=/home/sfilippo/COMPILERS/GFORTRAN/TEMP/mpfr-2.2.0
--with-mpfr=/home/sfi
lippo/COMPILERS/GFORTRAN/TEMP/mpfr
--with-gmp-dir=/home/sfilippo/COMPILERS/GFORT
RAN/TEMP/gmp-4.2/ --with-gmp=/home/sfilippo/COMPILERS/GFORTRAN/TEMP/gmp
Thread model: posix
gcc version 4.2.0 20061107 (prerelease)
[EMAIL PROTECTED] bugtest]$ gfortran -o dt_bnd -ggdb dt_bnd.f90
[EMAIL PROTECTED] bugtest]$ ./dt_bnd
Test case : 1
Description:
Base
Type 2 : 2 4 6 8 10
1
2 14 16 18 20 22 24
26 28 30 32 34 36 38
40
Multilevel: Level No 2
Multilevel: 5 10 15 20 25
30 35 40 45 50 55 60
65 70 75 80 85 90 95
100
Test case : 2
Description:
Base
Type 2 : 2 4 6 8 10
1
2 14 16 18 20 22 24
26 28 30 32 34 36 38
40
Multilevel: Level No 2
Multilevel: 5 10 15 20 25
30 35 40 45 50 55 60
65 70 75 80 85 90 95
100
[EMAIL PROTECTED] bugtest]$ gfortran -o dt_bnd -ggdb -fbounds-check
dt_bnd.f90
[EMAIL PROTECTED] bugtest]$ ./dt_bnd
Test case : 1
Segmentation fault (core dumped)
[EMAIL PROTECTED] bugtest]$ gdb dt_bnd -c core.4828
GNU gdb Red Hat Linux (6.0post-0.20040223.19rh)
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "i386-redhat-linux-gnu"...Using host libthread_db
lib
rary "/lib/tls/libthread_db.so.1".
Core was generated by `./dt_bnd'.
Program terminated with signal 11, Segmentation fault.
Reading symbols from /usr/local/gcc42/lib/libgfortran.so.2...done.
Loaded symbols for /usr/local/gcc42/lib/libgfortran.so.2
Reading symbols from /lib/tls/libm.so.6...done.
Loaded symbols for /lib/tls/libm.so.6
Reading symbols from /usr/local/gcc42/lib/libgcc_s.so.1...done.
Loaded symbols for /usr/local/gcc42/lib/libgcc_s.so.1
Reading symbols from /lib/tls/libc.so.6...done.
Loaded symbols for /lib/tls/libc.so.6
Reading symbols from /lib/ld-linux.so.2...done.
Loaded symbols for /lib/ld-linux.so.2
#0 0x08048c5a in __pp_type__dppset ([EMAIL PROTECTED], [EMAIL PROTECTED],
[EMAIL PROTECTED], iv=0x0, rs=0x0, rv=0x0, il=0x804d4c4, nl=0x804d4c4,
_ptype=2) at dt_bnd.f90:104
104 if (.not.allocated(p%bv(il_)%ipv)) then
--
Summary: segfault with -fbounds-check on allocatable derived type
components
Product: gcc
Version: 4.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: sfilippone at uniroma2 dot it
GCC build triplet: i686-pc-linux-gnu
GCC host triplet: i686-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29804
