fix for div zero (#34724)

* fix for div zero

* fix err;test=develop

* fix lod

paddle/fluid/operators/warpctc_op.h

@@ -199,6 +199,27 @@ class WarpCTCKernel : public framework::OpKernel<T> {
       sequence_width = logits->dims()[2];
       max_sequence_length = logits->dims()[0];
 
+      PADDLE_ENFORCE_GT(max_sequence_length, 0,
+                        platform::errors::InvalidArgument(
+                            "The first dimension of Input(Logits) should be "
+                            "greater than zero "
+                            "but received %d. ",
+                            max_sequence_length));
+
+      PADDLE_ENFORCE_GT(num_sequences, 0,
+                        platform::errors::InvalidArgument(
+                            "The second dimension of Input(Logits) should be "
+                            "greater than zero "
+                            "but received %d. ",
+                            num_sequences));
+
+      PADDLE_ENFORCE_GT(sequence_width, 0,
+                        platform::errors::InvalidArgument(
+                            "The third dimension of Input(Logits) should be "
+                            "greater than zero "
+                            "but received %d. ",
+                            sequence_width));
+
       auto* logits_length = ctx.Input<framework::Tensor>("LogitsLength");
       auto* labels_length = ctx.Input<framework::Tensor>("LabelLength");
       framework::Tensor logits_length_cpu;
@@ -229,6 +250,13 @@ class WarpCTCKernel : public framework::OpKernel<T> {
       logits_lod = framework::ToAbsOffset(logits->lod())[0];
       auto logits_dims = logits->dims();
 
+      PADDLE_ENFORCE_GT(logits_dims[0], 0,
+                        platform::errors::InvalidArgument(
+                            "The first dimension of Input(Logits) should be "
+                            "greater than zero "
+                            "but received %d. ",
+                            logits_dims[0]));
+
       PADDLE_ENFORCE_EQ(
           logits_dims[0], static_cast<int64_t>(logits_lod.back()),
           platform::errors::InvalidArgument(