fix

Author: den818

ut/sparse_ut.cpp

@@ -181,7 +181,7 @@ TEST_F(SparseCase, FixedString_Load) {
 
     checkSerializationKind();
 
-    auto rpad = [](const std::string& val) {
+    auto rpad = [&](const std::string& val) {
         std::string res = val;
         res.append(std::string(FixedStringSize - res.size(), '\0'));
         return res;