fix range op (#37486)

python/paddle/fluid/layers/tensor.py

@@ -1433,7 +1433,9 @@ def range(start, end, step, dtype, name=None):
         step = cast(step, dtype)
 
     if in_dygraph_mode():
-        return _C_ops.range(start, end, step)
+        out = _C_ops.range(start, end, step)
+        out.stop_gradient = True
+        return out
 
     out_shape = None
     if not isinstance(start, Variable) and not isinstance(