Found at http://groups.google.com/group/comp.lang.fortran/browse_thread/thread/0f1d7da66fa015c2
(There is another issue with constant folding, which Steve wants to fix.) The following program compiles with NAG f95/g95/ifort and prints "T F". With gfortran 4.3 and 4.4 it crashes (with 4.1/4.2 it does not compile): f951: internal compiler error: in gfc_target_encode_expr, at fortran/target-memory.c:249 gcc_assert (source->expr_type == EXPR_CONSTANT || source->expr_type == EXPR_STRUCTURE || source->expr_type == EXPR_SUBSTRING); Here, source->expr_type == EXPR_OP. Reduced testcase: integer z(0*transfer(2.D0**2.,1)+2) end Long testcase, see http://groups.google.com/group/comp.lang.fortran/msg/c71f697c3e21e3f2 -- Summary: ICE in in gfc_target_encode_expr Product: gcc Version: 4.4.0 Status: UNCONFIRMED Keywords: ice-on-valid-code Severity: normal Priority: P3 Component: fortran AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: burnus at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38822