$ cat exponent-3.f90
program main
real, parameter :: n = 1024, iter=1000
real, dimension(n) :: num1,num2
call random_number(num1)
real :: start
do i=1,iter
num2 = num1**2
end do
end program main
$ gfortran exponent-3.f90
exponent-3.f90:5.15:
real :: start
1
Error: Unexpected data declaration statement at (1)
exponent-3.f90:3.18:
real, dimension(n) :: num1,num2
1
Error: Expression at (1) must be of INTEGER type
exponent-3.f90:3.33:
real, dimension(n) :: num1,num2
1
Error: The module or main program array 'num2' at (1) must have constant shape
exponent-3.f90:3.18:
real, dimension(n) :: num1,num2
1
Error: Expression at (1) must be of INTEGER type
exponent-3.f90:3.28:
real, dimension(n) :: num1,num2
1
Error: The module or main program array 'num1' at (1) must have constant shape
exponent-3.f90:0: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
$ gfortran -v
Using built-in specs.
Target: i686-pc-linux-gnu
Configured with: ../../gcc/trunk/configure --prefix=/home/ig25
--enable-maintainer-mode --enable-languages=c,fortran
Thread model: posix
gcc version 4.3.0 20070419 (experimental)
The backtrace is confused, looks like a smashed stack:
Error: The module or main program array 'num1' at (1) must have constant shape
Program received signal SIGSEGV, Segmentation fault.
0xb7ef8103 in __gmpz_sub () from /usr/local/lib/libgmp.so.3
(gdb) bt
#0 0xb7ef8103 in __gmpz_sub () from /usr/local/lib/libgmp.so.3
#1 0xb7edf840 in ?? () from /usr/local/lib/libgmp.so.3
#2 0x0860eca0 in ?? ()
#3 0x0000000b in ?? ()
#4 0x0860f508 in ?? ()
#5 0x00000001 in ?? ()
#6 0x00000001 in ?? ()
#7 0x00000004 in ?? ()
#8 0x0860eca0 in ?? ()
#9 0x00000000 in ?? ()
--
Summary: segfault after mixing declarations and executable
statements
Product: gcc
Version: 4.3.0
Status: UNCONFIRMED
Keywords: ice-on-invalid-code, error-recovery
Severity: normal
Priority: P3
Component: fortran
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: tkoenig at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31716
