Fix num_roots to be 1. (#5165)

2019-12-30 02:18:45 +08:00
parent d55489af14
commit 139ccc9902
3 changed files with 3 additions and 0 deletions
--- a/src/gbm/gbtree_model.h
+++ b/src/gbm/gbtree_model.h
@@ -47,6 +47,7 @@ struct GBTreeModelParam : public dmlc::Parameter<GBTreeModelParam> {
    std::memset(this, 0, sizeof(GBTreeModelParam));  // FIXME(trivialfis): Why?
    static_assert(sizeof(GBTreeModelParam) == (4 + 2 + 2 + 32) * sizeof(int32_t),
                  "64/32 bit compatibility issue");
+    deprecated_num_roots = 1;
  }

  // declare parameters, only declare those that need to be set.