http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57611
Bug ID: 57611 Summary: [Fortran-Dev Regression] Too much memory allocated (gfortran.dg/coarray_lib_alloc_2.f90) Product: gcc Version: fortran-dev Status: UNCONFIRMED Keywords: wrong-code Severity: normal Priority: P3 Component: fortran Assignee: unassigned at gcc dot gnu.org Reporter: burnus at gcc dot gnu.org Blocks: 56818 The following should be: yy._data.base_addr = (void * restrict) __builtin_malloc (1); however, it is yy._data.base_addr = (void * restrict) __builtin_malloc (128); type t end type t class(t), allocatable :: yy(:) allocate(yy(2)) end Similarly for coarrays, cf. gfortran.dg/coarray_lib_alloc_2.f90: class(t), allocatable :: xx[:], yy(:)[:] allocate(yy(2)[*], stat=stat, errmsg=errmsg) which gives xx._data.base_addr = _gfortran_caf_register (72, 1, &xx._data.token, &stat.0, &errmsg, 200); yy._data.base_addr = _gfortran_caf_register (192, 1, &yy._data.token, &stat.2, &errmsg, 200); The first arguments should be "1" instead of 72/192. As the email at http://gcc.gnu.org/ml/fortran/2013-06/msg00071.html indicates, there seems to be some pointer involved as the size varies between 32 and 64 bit systems.