fix #818

src/boosting/gbdt.cpp

@@ -66,6 +66,7 @@ GBDT::~GBDT() {
 
 void GBDT::Init(const BoostingConfig* config, const Dataset* train_data, const ObjectiveFunction* objective_function,
                 const std::vector<const Metric*>& training_metrics) {
+  CHECK(train_data->num_features() > 0);
   train_data_ = train_data;
   iter_ = 0;
   num_iteration_for_pred_ = 0;
@@ -164,7 +165,7 @@ void GBDT::ResetTrainingData(const Dataset* train_data, const ObjectiveFunction*
   if (train_data != train_data_ && !train_data_->CheckAlign(*train_data)) {
     Log::Fatal("cannot reset training data, since new training data has different bin mappers");
   }
-
+  CHECK(train_data->num_features() > 0);
   objective_function_ = objective_function;
   if (objective_function_ != nullptr) {
     is_constant_hessian_ = objective_function_->IsConstantHessian();

src/c_api.cpp

@@ -38,6 +38,7 @@ public:
 
   Booster(const Dataset* train_data,
           const char* parameters) {
+    CHECK(train_data->num_features() > 0);
     auto param = ConfigBase::Str2Map(parameters);
     config_.Set(param);
     if (config_.num_threads > 0) {
@@ -94,6 +95,7 @@ public:
 
   void ResetTrainingData(const Dataset* train_data) {
     if (train_data != train_data_) {
+      CHECK(train_data->num_features() > 0);
       std::lock_guard<std::mutex> lock(mutex_);
       train_data_ = train_data;
       CreateObjectiveAndMetrics();

src/io/dataset.cpp

@@ -24,10 +24,12 @@ Dataset::Dataset() {
 }
 
 Dataset::Dataset(data_size_t num_data) {
+  CHECK(num_data > 0);
   data_filename_ = "noname";
   num_data_ = num_data;
   metadata_.Init(num_data_, NO_SPECIFIC, NO_SPECIFIC);
   is_finish_load_ = false;
+  group_bin_boundaries_.push_back(0);
 }
 
 Dataset::~Dataset() {
@@ -223,7 +225,9 @@ void Dataset::Construct(
       used_features.emplace_back(i);
     }
   }
-
+  if (used_features.empty()) {
+    Log::Fatal("Cannot construct Dataset since there are not useful features.");
+  }
   auto features_in_group = NoGroup(used_features);
 
   if (io_config.enable_bundle) {