Update loss.py

python/paddle/nn/functional/loss.py

@@ -1668,12 +1668,12 @@ def cross_entropy(input,
                     format(invalid_label[0], 0))
             # TODO: Temporarily use paddle.nonzero instead of paddle.max 
             # to detect and find out possible illegal label values
-            if len(paddle.nonzero(valid_label >= input.shape[-1])) > 0:
+            if len(paddle.nonzero(valid_label >= input.shape[axis])) > 0:
                 invalid_label = paddle.gather_nd(
-                    valid_label, paddle.nonzero(valid_label >= input.shape[-1]))
+                    valid_label, paddle.nonzero(valid_label >= input.shape[axis]))
                 raise ValueError(
                     "Target({}) is out of class_dimension's upper bound({})".
-                    format(invalid_label[0], input.shape[-1] - 1))
+                    format(invalid_label[0], input.shape[axis] - 1))
 
         _, out = _C_ops.softmax_with_cross_entropy(
             input, label, 'soft_label', soft_label, 'ignore_index',