update

nifty/operators/diagonal_operator/diagonal_operator.py

@@ -197,7 +197,6 @@ class DiagonalOperator(EndomorphicOperator):
         See Also
         --------
         """
-        return self.inverse_diagonal(bare=bare, copy=False).sum()
         return self.inverse_diagonal(bare=bare).sum()
 
     def trace_log(self):

test/test_operators/test_diagonal_operator.py

@@ -110,7 +110,7 @@ class DiagonalOperator_Tests(unittest.TestCase):
         diag = Field.from_random('normal', domain=space)
         D = DiagonalOperator(space, diagonal=diag, bare=bare, copy=copy)
         trace_log = D.trace_log()
-        assert_allclose(trace_log, np.log(np.sum(diag)))
+        assert_allclose(trace_log, np.log(np.sum(diag.val.get_full_data())))
 
     @expand(product(spaces, [True, False], [True, False]))
     def test_determinant(self, space, bare, copy):