`CHECK` fail in `FractionalMaxPoolGrad` in TensorFlow

@@ -19,12 +19,13 @@ limitations under the License.
 #include <random>
 #include <vector>
 
-#include "tensorflow/core/kernels/fractional_pool_common.h"
-
 #include "third_party/eigen3/unsupported/Eigen/CXX11/Tensor"
 #include "tensorflow/core/framework/numeric_op.h"
 #include "tensorflow/core/framework/op_kernel.h"
+#include "tensorflow/core/framework/op_requires.h"
+#include "tensorflow/core/kernels/fractional_pool_common.h"
 #include "tensorflow/core/lib/random/random.h"
+#include "tensorflow/core/platform/errors.h"
 #include "tensorflow/core/platform/logging.h"
 #include "tensorflow/core/platform/mutex.h"
 #include "tensorflow/core/util/guarded_philox_random.h"
@@ -352,7 +353,9 @@ class FractionalMaxPoolGradOp : public OpKernel {
         output_size[2] * output_size[1] * output_size[0];
     for (int64_t i = 0; i < num_reshaped_cols; ++i) {
       for (int64_t j = 0; j < output_size[3]; ++j) {
-        DCHECK_EQ(tensor_out_dup_mat(j, i), tensor_out_mat(j, i));
+        OP_REQUIRES(context, tensor_out_dup_mat(j, i) == tensor_out_mat(j, i),
+                    errors::InvalidArgument(
+                        "tensor_out_dup is not the same as tensor_out"));
       }
     }
 
@@ -369,11 +372,12 @@ class FractionalMaxPoolGradOp : public OpKernel {
 
     for (int index = 0; index < num_total_outputs; ++index) {
       int input_backprop_index = out_arg_max_flat(index);
-      // According to maxpooling_op.cc, the performance impact below is small.
-      CHECK(input_backprop_index >= 0 &&
-            input_backprop_index < num_total_inputs)
-          << "Invalid input backprop index: " << input_backprop_index << ", "
-          << num_total_inputs;
+      OP_REQUIRES(
+          context,
+          input_backprop_index >= 0 && input_backprop_index < num_total_inputs,
+          errors::InvalidArgument(
+              "Invalid input backprop index: ", input_backprop_index, ", ",
+              num_total_inputs));
       input_backprop_flat(input_backprop_index) += out_backprop_flat(index);
     }
   }

@@ -124,7 +124,7 @@ def _ValidateFractionalMaxPoolResult(self, input_tensor, pooling_ratio,
     Returns:
       None
     """
-    with self.cached_session() as sess:
+    with self.cached_session():
       p, r, c = nn_ops.fractional_max_pool_v2(
           input_tensor,
           pooling_ratio,
@@ -155,7 +155,7 @@ def _testVisually(self):
           overlapping))
       rand_mat = self._PRNG.randint(10, size=tensor_shape)
       pooling_ratio = [1, math.sqrt(2), math.sqrt(2), 1]
-      with self.cached_session() as sess:
+      with self.cached_session():
         p, r, c = nn_ops.fractional_max_pool_v2(
             rand_mat,
             pooling_ratio,
@@ -630,6 +630,29 @@ def testWhenRepeatedMaxValueInPoolingRegion(self):
       self.assertAllClose(expected_input_backprop_overlapping,
                           input_backprop_overlapping)
 
+  def testInvalidSeqRaiseErrorForFractionalMaxPoolGrad(self):
+    with self.assertRaises(errors.InvalidArgumentError):
+      with self.cached_session() as _:
+        overlapping = True
+        orig_input = constant_op.constant(
+            .453409232, shape=[1, 7, 13, 1], dtype=dtypes.float32)
+        orig_output = constant_op.constant(
+            .453409232, shape=[1, 7, 13, 1], dtype=dtypes.float32)
+        out_backprop = constant_op.constant(
+            .453409232, shape=[1, 7, 13, 1], dtype=dtypes.float32)
+        row_pooling_sequence = constant_op.constant(
+            0, shape=[5], dtype=dtypes.int64)
+        col_pooling_sequence = constant_op.constant(
+            0, shape=[5], dtype=dtypes.int64)
+        t = gen_nn_ops.FractionalMaxPoolGrad(
+            orig_input=orig_input,
+            orig_output=orig_output,
+            out_backprop=out_backprop,
+            row_pooling_sequence=row_pooling_sequence,
+            col_pooling_sequence=col_pooling_sequence,
+            overlapping=overlapping)
+        self.evaluate(t)
+
 
 if __name__ == "__main__":
   test.main()