http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54832
janus at gcc dot gnu.org changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |ASSIGNED AssignedTo|unassigned at gcc dot |janus at gcc dot gnu.org |gnu.org | Ever Confirmed|0 |1 --- Comment #3 from janus at gcc dot gnu.org 2012-10-06 11:17:46 UTC --- The problem was apparently that the 'class_ok' attribute was not propagated properly. The following patch fixes it for me: Index: gcc/fortran/resolve.c =================================================================== --- gcc/fortran/resolve.c (revision 192004) +++ gcc/fortran/resolve.c (working copy) @@ -12009,6 +12009,7 @@ resolve_fl_derived0 (gfc_symbol *sym) c->attr.pointer = ifc->result->attr.pointer; c->attr.dimension = ifc->result->attr.dimension; c->as = gfc_copy_array_spec (ifc->result->as); + c->attr.class_ok = ifc->result->attr.class_ok; } else { @@ -12017,6 +12018,7 @@ resolve_fl_derived0 (gfc_symbol *sym) c->attr.pointer = ifc->attr.pointer; c->attr.dimension = ifc->attr.dimension; c->as = gfc_copy_array_spec (ifc->as); + c->attr.class_ok = ifc->attr.class_ok; } c->ts.interface = ifc; c->attr.function = ifc->attr.function; @@ -12028,7 +12030,6 @@ resolve_fl_derived0 (gfc_symbol *sym) c->attr.recursive = ifc->attr.recursive; c->attr.always_explicit = ifc->attr.always_explicit; c->attr.ext_attr |= ifc->attr.ext_attr; - c->attr.class_ok = ifc->attr.class_ok; /* Replace symbols in array spec. */ if (c->as) {