[Bug fortran/31011] New: Incorrect error: parameter array sections

["terry at chem dot gu dot se" <gcc-bugzilla at gcc dot gnu dot org>]

On a 64-bit Ubuntu 6.10 system with gcc-4.2-20070228, gfortran erroneously
gives an error for good F90 code.  In the code two parameter arrays are defined
then one is multiplied by a section of the other, with the section selected
with non-unit stride.  An error is generated referencing the declaration of the
sectioned array.  It looks like the array section is not being generated
properly, but simply writing the array section to stdout produces the expected
output.

The error is not produced if either of the arrays are not parameters, or the
array section is unit stride.  gfortran from Ubuntu's gcc-4.1.2 gives the same
error.


[tjf@fkpc167 VielPotential]$ cat bugtest.f90 
program PotentialMatrix
implicit none
real(kind=8),dimension(2),parameter::v2=(/1,2/)
real(kind=8),dimension(4),parameter::v4=(/1,2,3,4/)
write(*,*)v2*v4(1:3:2)
end

[tjf@fkpc167 VielPotential]$ gfortran -v -g -o bugtest bugtest.f90
Driving: gfortran -v -g -o bugtest bugtest.f90 -lgfortranbegin -lgfortran -lm
-shared-libgcc
Using built-in specs.
Target: x86_64-unknown-linux-gnu
Configured with: ./configure --disable-multilib --enable-languages=fortran
Thread model: posix
gcc version 4.2.0 20070228 (prerelease)
 /usr/local/libexec/gcc/x86_64-unknown-linux-gnu/4.2.0/f951 bugtest.f90 -quiet
-dumpbase bugtest.f90 -mtune=generic -auxbase bugtest -g -version -I
/usr/local/lib/gcc/x86_64-unknown-linux-gnu/4.2.0/finclude -o /tmp/cc5EhKbq.s
GNU F95 version 4.2.0 20070228 (prerelease) (x86_64-unknown-linux-gnu)
        compiled by GNU C version 4.2.0 20070228 (prerelease).
GGC heuristics: --param ggc-min-expand=89 --param ggc-min-heapsize=112046
bugtest.f90:3.40:

real(kind=8),dimension(2),parameter::v2=(/1,2/)
                                       1
Error: different shape for Elemental binary operation at (1) on dimension 1
(2/1)
bugtest.f90:3.40:

real(kind=8),dimension(2),parameter::v2=(/1,2/)
                                       1
Error: Array operands are incommensurate at (1)
[tjf@fkpc167 VielPotential]$


-- 
           Summary: Incorrect error: parameter array sections
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: terry at chem dot gu dot se
 GCC build triplet: x86_64-unknown-linux-gnu
  GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: x86_64-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31011