[Patch, fortran] PR25077 - No diagnostic if interface assignment modifies intrinsic type assigments

[Paul Thomas]

:ADDPATCH fortran:

If this comes through twice, I apologise - I apparently sent it OK last 
night but I have not seen it on the list.

The title, ChangeLog and patch speak for themselves here.  The only 
question that I would have about this patch is whether we want an error 
or a warning?  At present, gfortran silently ignores such interface 
assignments and uses the intrinsic assignments.  The testcase is 
developed from the reporter's example.

Regested on SUSE10.1/AMD64 - OK for trunk and 4.1?

Paul

2006-08-19  Paul Thomas  <pault@gcc.gnu.org>

   PR fortran/25077
   * interface.c (check_operator_interface): Throw error if the
   interface assignment tries to change intrinsic type assigments.

2006-08-19  Paul Thomas  <pault@gcc.gnu.org>

   PR fortran/25077
   * gfortran.dg/redefined_intrinsic_assignment.f90: New test.

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