technique wise, it's not too hard, but it only takes one little screw up to bring the whole thing crashing down. Back in an older version of MS C++ compiler/l

technique wise, it's not too hard, but it only takes one little screw up to bring the whole thing crashing down. Back in an older version of MS C++ compiler/library their std::string had this bug where strings weren't thread safe as they relied on global state. That took a while to find.