fix trace op stack overflow

Author: root

python/paddle/tensor/math.py

@@ -1657,12 +1657,6 @@ def trace(x, offset=0, axis1=0, axis2=1, name=None):
             data2 = paddle.trace(case2, offset=1, axis1=1, axis2=2) # data2.shape = [3]
             data3 = paddle.trace(case3, offset=-3, axis1=1, axis2=-1) # data2.shape = [3, 5]
     """
-    if in_dygraph_mode():
-        return _C_ops.trace(x, 'offset', offset, 'axis1', axis1, 'axis2', axis2)
-
-    inputs = {'Input': [x]}
-    attrs = {'offset': offset, 'axis1': axis1, 'axis2': axis2}
-
     def __check_input(input, offset, dim1, dim2):
         check_dtype(x.dtype, 'Input',
                     ['int32', 'int64', 'float16', 'float32', 'float64'],
@@ -1677,11 +1671,11 @@ def __check_input(input, offset, dim1, dim2):
         axis1_ = axis1 if axis1 >= 0 else len(input_shape) + axis1
         axis2_ = axis2 if axis2 >= 0 else len(input_shape) + axis2
 
-        assert axis1_ < len(input_shape),     \
+        assert ((0 <= axis1_) and (axis1_ < len(input_shape))),     \
             "The argument axis1 is out of range (expected to be in range of [%d, %d], but got %d).\n"  \
             % (-(len(input_shape)), len(input_shape) - 1, axis1)
 
-        assert axis2_ < len(input_shape),   \
+        assert ((0 <= axis2_) and (axis2_ < len(input_shape))),   \
             "The argument axis2 is out of range (expected to be in range of [%d, %d], but got %d).\n"   \
             % (-(len(input_shape)), len(input_shape) - 1, axis2)
 
@@ -1691,6 +1685,11 @@ def __check_input(input, offset, dim1, dim2):
                 "But received axis1 = %d, axis2 = %d\n"%(axis1, axis2)
 
     __check_input(input, offset, axis1, axis2)
+    if in_dygraph_mode():
+        return _C_ops.trace(x, 'offset', offset, 'axis1', axis1, 'axis2', axis2)
+
+    inputs = {'Input': [x]}
+    attrs = {'offset': offset, 'axis1': axis1, 'axis2': axis2}
     helper = LayerHelper('trace', **locals())
 
     out = helper.create_variable_for_type_inference(dtype=x.dtype)