Gfortran is not checking if an assumed sized array is used correctly in an array expression. Gfortran compiles the following without an error or warning
subroutine e(a) real, intent(out) :: a(*) a = 1.e0 end subroutine NAG's compiler issues kargl[210] f95 -c e.f90 Error: e.f90, line 3: Invalid appearance of assumed-size array name A [f95 error termination] which is confirmed by Lahey's web based Fortran checker. -- Summary: Illegal use of assumed-sized array in an array expression Product: gcc Version: 4.1.0 Status: UNCONFIRMED Severity: normal Priority: P2 Component: fortran AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: kargl at gcc dot gnu dot org CC: gcc-bugs at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21256