Fortran 2008 does not allow this statement or directive: error stop

For some reason ifort complains about error stop not being part of the 2008 standard.

[raul@desk ~]$ cat main.f90 
  error stop
end program
[raul@desk ~]$ ifort main.f90 # no problems here
[raul@desk ~]$ ifort -std08 main.f90 
main.f90(1): warning #6477: Fortran 2008 does not allow this statement or directive.
  error stop
--^

A small bug or have I misunderstood something?

Thanks