mongo/util/shared_buffer.h uses a placement new on line 60. It does not include <new> prior to that. Nor does it use std:: as a prefix.

When including "mongo/client/dbclient.h", depending on other includes in the cpp, this results in the occasional compile error :

%MONGO_INCLUDE%\mongo/util/shared_buffer.h(60): error C2061: syntax error : identifier 'holderPrefixedData'