This is a problem very similar to this one: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42008
gfortran rejects the attached code because: gfortran -c err.f90 err.f90:6.20: integer :: i = 0 1 Error: Initialization of variable at (1) is not allowed in a PURE procedure However, I think that the program is fine. module mod_xyz implicit none contains pure subroutine psub() type ilist integer :: i = 0 end type ilist end subroutine psub end module mod_xyz -- Summary: Wrongly rejected derived types with default initializers in PURE procedures 2 Product: gcc Version: 4.5.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: fortran AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: mrestelli at gmail dot com GCC build triplet: GNU Fortran (GCC) 4.5.0 20100125 (experimental) http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42922