!12604 add shape check for sequence_mask

From: @TFbunny
Reviewed-by: @tom__chen,@robingrosman
Signed-off-by: @robingrosman

mindspore/ops/composite/array_ops.py

@@ -108,8 +108,13 @@ def repeat_elements(x, rep, axis=0):
 @constexpr
 def _check_sequence_mask_input_len(input_shape):
     if not input_shape:
-        raise ValueError(f"sequence_mask input lengths_shape should be > 0. "
-                         f"current lengths_shape is {input_shape}.")
+        raise ValueError(f"Sequence_mask lengths_shape should be > 0. "
+                         f"Current lengths_shape is {input_shape}.")
+    # broadcast only supports 7d shape
+    shape_size = len(input_shape)
+    if shape_size >= 7:
+        raise ValueError(f"Sequence_mask lengths_shape's size only support a value less than 7. "
+                         f"Current lengths_shape is {shape_size}d.")
 
 
 def sequence_mask(lengths, maxlen=None):