[ci] more ubuntu ci test fixes

Author: fangq

include/nlohmann/detail/input/binary_reader.hpp

@@ -2984,11 +2984,11 @@ class binary_reader
 
         struct field_data_t
         {
-            std::vector<string_t> strings{};
-            std::vector<bool> bools{};
-            std::vector<std::int64_t> integers{};
-            std::vector<std::uint64_t> unsigneds{};
-            std::vector<double> floats{};
+            std::vector<string_t> strings;
+            std::vector<bool> bools;
+            std::vector<std::int64_t> integers;
+            std::vector<std::uint64_t> unsigneds;
+            std::vector<double> floats;
         };
 
         std::vector<field_data_t> field_data(nf);

include/nlohmann/detail/output/binary_writer.hpp

@@ -74,10 +74,10 @@ class binary_writer
         int type_marker{};
         bjdata_soa_string_encoding_t str_enc{bjdata_soa_string_encoding_t::fixed};
         std::size_t str_fixed_len{};
-        std::vector<std::size_t> str_indices{};
-        std::vector<string_t> str_dict{};
-        std::vector<std::size_t> str_offsets{};
-        string_t str_buffer{};
+        std::vector<std::size_t> str_indices;
+        std::vector<string_t> str_dict;
+        std::vector<std::size_t> str_offsets;
+        string_t str_buffer;
     };
 
   public:
@@ -1937,7 +1937,7 @@ class binary_writer
         std::size_t fixed_cost = max_len * arr.size();
 
         // Dict cost
-        std::size_t idx_size;
+        std::size_t idx_size = 0;
         if (unique_count <= 255)
         {
             idx_size = 1;
@@ -1953,7 +1953,7 @@ class binary_writer
         std::size_t dict_cost = (idx_size * arr.size()) + total_len + (unique_count * 2);
 
         // Offset cost
-        std::size_t off_size;
+        std::size_t off_size = 0;
         if (total_len <= 255)
         {
             off_size = 1;
@@ -2052,7 +2052,7 @@ class binary_writer
         {
             // Write index
             auto it = std::find(field.str_dict.begin(), field.str_dict.end(), value);
-            std::size_t idx = static_cast<std::size_t>(std::distance(field.str_dict.begin(), it));
+            auto idx = static_cast<std::size_t>(std::distance(field.str_dict.begin(), it));
 
             if (idx < 256)
             {

single_include/nlohmann/json.hpp

@@ -12822,11 +12822,11 @@ class binary_reader
 
         struct field_data_t
         {
-            std::vector<string_t> strings{};
-            std::vector<bool> bools{};
-            std::vector<std::int64_t> integers{};
-            std::vector<std::uint64_t> unsigneds{};
-            std::vector<double> floats{};
+            std::vector<string_t> strings;
+            std::vector<bool> bools;
+            std::vector<std::int64_t> integers;
+            std::vector<std::uint64_t> unsigneds;
+            std::vector<double> floats;
         };
 
         std::vector<field_data_t> field_data(nf);
@@ -16848,10 +16848,10 @@ class binary_writer
         int type_marker{};
         bjdata_soa_string_encoding_t str_enc{bjdata_soa_string_encoding_t::fixed};
         std::size_t str_fixed_len{};
-        std::vector<std::size_t> str_indices{};
-        std::vector<string_t> str_dict{};
-        std::vector<std::size_t> str_offsets{};
-        string_t str_buffer{};
+        std::vector<std::size_t> str_indices;
+        std::vector<string_t> str_dict;
+        std::vector<std::size_t> str_offsets;
+        string_t str_buffer;
     };
 
   public:
@@ -18711,7 +18711,7 @@ class binary_writer
         std::size_t fixed_cost = max_len * arr.size();
 
         // Dict cost
-        std::size_t idx_size;
+        std::size_t idx_size = 0;
         if (unique_count <= 255)
         {
             idx_size = 1;
@@ -18727,7 +18727,7 @@ class binary_writer
         std::size_t dict_cost = (idx_size * arr.size()) + total_len + (unique_count * 2);
 
         // Offset cost
-        std::size_t off_size;
+        std::size_t off_size = 0;
         if (total_len <= 255)
         {
             off_size = 1;
@@ -18826,7 +18826,7 @@ class binary_writer
         {
             // Write index
             auto it = std::find(field.str_dict.begin(), field.str_dict.end(), value);
-            std::size_t idx = static_cast<std::size_t>(std::distance(field.str_dict.begin(), it));
+            auto idx = static_cast<std::size_t>(std::distance(field.str_dict.begin(), it));
 
             if (idx < 256)
             {