message: we do this these days
diff: @@ -108,7 +108,6 @@ pub fn create_ecx<'mir, 'tcx: 'mir>(
  ecx.machine.argc = Some(argc_place.ptr.to_ptr()?);
  }
  - // FIXME: extract main source file path.
  // Third argument (`argv`): created from `config.args`.
  let dest = ecx.eval_place(&mir::Place::Base(mir::PlaceBase::Local(args.next().unwrap())))?;
  // For Windows, construct a command string with all the aguments.
  