Consider the following program:
program test print*,ibset(1,65) end program test
Here's the result:
$ ifort -o test test.f90 $ ./test 3 $ ifort -V Intel(R) Fortran Intel(R) 64 Compiler XE for applications running on Intel(R) 64, Version 18.104.22.168 Build 20121010 Copyright (C) 1985-2012 Intel Corporation. All rights reserved. FOR NON-COMMERCIAL USE ONLY
Shouldn't the compiler throw an error in such cases?