fix serializer bug, now really

6 jobs for v2beta
Status Job ID Name Coverage
  Test
passed clang-c++11 #1256
Linux

00:02:11

passed clang-c++98 #1258
Linux

00:01:33

passed gcc-c++11 #1255
Linux

00:03:03

passed gcc-c++98 #1257
Linux

00:02:35

passed macos-c++11 #1259
Apple

00:01:23

passed macos-c++98 #1260
Apple

00:01:20