Fix parsing empty vector in parameter. (#5087)

2019-12-05 11:42:01 +08:00
parent f5e13dcb9b
commit df9bdbbcb9
4 changed files with 89 additions and 57 deletions
--- a/tests/cpp/tree/test_param.cc
+++ b/tests/cpp/tree/test_param.cc
@@ -74,6 +74,12 @@ TEST(Param, VectorStreamRead) {
  ss << "(3,2,1";
  ss >> vals_in;
  EXPECT_NE(vals_in, vals);
+
+  vals_in.clear(); ss.flush(); ss.clear(); ss.str("");
+  vals_in.emplace_back(3);
+  ss << "( )";
+  ss >> vals_in;
+  ASSERT_TRUE(ss.good());
 }

 TEST(Param, SplitEntry) {