[dask] Fix ddqdm with empty partition. (#7510)

* Fix empty partition. * war.
2021-12-16 20:37:29 +08:00
parent a512b4b394
commit 70b12d898a
8 changed files with 59 additions and 35 deletions
--- a/tests/cpp/data/test_metainfo.cc
+++ b/tests/cpp/data/test_metainfo.cc
@@ -56,7 +56,7 @@ TEST(MetaInfo, GetSetFeature) {
  std::vector<char const*> c_types(kCols);
  std::transform(types.cbegin(), types.cend(), c_types.begin(),
                 [](auto const &str) { return str.c_str(); });
-  // Info has 0 column
+  info.num_col_ = 1;
  EXPECT_THROW(
      info.SetFeatureInfo(u8"feature_type", c_types.data(), c_types.size()),
      dmlc::Error);