internal compiler error

I am using Intel(R) Visual Fortran Compiler 16.0.1.146.  When I compile the following sample program, the compiler crashes with:

fortcom: Fatal: There has been an internal compiler error (C0000005).

The following compiler options are set:

ifort /nologo /debug:full /Od /heap-arrays0 /Qopenmp /stand:f08 /warn:all /Qtrapuv /Qinit:snan /Qinit:arrays /fpe:0 /module:"x64\Debug\\" /object:"x64\Debug\\" /Fd"x64\Debug\vc100.pdb" /traceback /check:all /libs:static /threads /dbglibs /c /Qvc10

module mymod2

   type mytype
      real,allocatable:: w(:)
   end type mytype

   interface operator(*)
      module procedure vectormult
   end interface

   contains

   function vectormult( a, b )  result(c)
   implicit none
   type(mytype),intent(in):: a
   real,intent(in):: b(:)
   real,allocatable:: c(:)
   integer i, n

   n = size(b)

   allocate( c(n) )
   do i = 1, n
      c(i) = a%w(i) * b(i)
   end do
   return
   end function vectormult


end module mymod2

!------------------------------------------------

module mymod
contains

   subroutine mysub()
   use mymod2, only: mytype, operator(*)
   implicit none

   integer i, m,n
   real,allocatable:: a(:,:)
   real,allocatable:: z(:)
   type(mytype)::  x, y

   m = 100
   n = 10
   allocate(a(n,m))
   allocate( x%w(n), y%w(n), z(n)  )
   x%w = 1.0 ; y%w = 1.0
   z = 1.0

   !$OMP parallel default(shared), private(i)
   !$OMP do schedule(dynamic)
   do i = 1, m
      a(:,i) = x * (y * z)
   end do
   !$OMP end do
   !$OMP end parallel

   return
   end subroutine mysub
end module mymod

!------------------------------------------------

program test_ice

use mymod, only: mysub
implicit none

call mysub()

stop
end program test_ice