refine infer shape, test=develop

paddle/fluid/operators/detection/box_coder_op.cc

@@ -43,7 +43,7 @@ class BoxCoderOp : public framework::OperatorWithKernel {
         if (prior_box_var_dims.size() == 1) {
           PADDLE_ENFORCE_EQ(
               prior_box_var_dims[0], 4,
-              "The 1st dimension of Input(PriorBoxVar) should be 1"
+              "The 1st dimension of Input(PriorBoxVar) should be 4"
               "when the rank is 1.");
         } else {
           PADDLE_ENFORCE_EQ(
@@ -52,9 +52,9 @@ class BoxCoderOp : public framework::OperatorWithKernel {
               "the dimension of Input(PriorBox when the rank is 2.)");
         }
       }
+    }
 
-      auto code_type =
-          GetBoxCodeType(ctx->Attrs().Get<std::string>("code_type"));
+    auto code_type = GetBoxCodeType(ctx->Attrs().Get<std::string>("code_type"));
     int axis = ctx->Attrs().Get<int>("axis");
     if (code_type == BoxCodeType::kEncodeCenterSize) {
       PADDLE_ENFORCE_EQ(target_box_dims.size(), 2,
@@ -84,7 +84,6 @@ class BoxCoderOp : public framework::OperatorWithKernel {
       ctx->ShareLoD("TargetBox", /*->*/ "OutputBox");
     }
   }
-  }
 };
 
 class BoxCoderOpMaker : public framework::OpProtoAndCheckerMaker {