[Bug fortran/20520] New: allocatable arrays may be used without being allocated

["ebertakis at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

The compiler does not display an error message when in a source file 
allocatable arrays are being used without having been allocated beforehand. For 
example, the following code is erroneous, but nevertheless the compiler will 
compile (and build) it silently:

real,allocatable:: a(:),b(:)

a(1)=2*b(1)

end

Of course, the executable produced will collapse when run.

The gfortran compiler used was the standalone package for Windows (downloaded 
as a zip archive).

-- 
           Summary: allocatable arrays may be used without being allocated
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: ebertakis at gmail dot com
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20520