Properly initialize UUID used in Fingerprint class. Fixes #1721

util/fingerprint_impl.hpp.in

@@ -28,6 +28,7 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "osrm_exception.hpp"
 
 #include <boost/uuid/name_generator.hpp>
+#include <boost/uuid/uuid_generators.hpp>
 
 #include <cstring>
 
@@ -47,6 +48,13 @@ FingerPrint FingerPrint::GetValid()
     fingerprint.magic_number = 1297240911;
     fingerprint.md5_prepare[32] = fingerprint.md5_tree[32] = fingerprint.md5_graph[32] = fingerprint.md5_objects[32] = '\0';
 
+    // 6ba7b810-9dad-11d1-80b4-00c04fd430c8 is a Well Known UUID representing the DNS
+    // namespace.  Its use here indicates that we own this part of the UUID space
+    // in the DNS realm.  *Usually*, we would then generate a UUID based on "something.project-osrm.org",
+    // but this whole class is a hack.  Anyway, named_uuid needs to be initialized to something
+    // before it can be used, and this is as good as anything else for these purposes.
+    fingerprint.named_uuid = boost::uuids::string_generator()( "{6ba7b810-9dad-11d1-80b4-00c04fd430c8}");
+
     boost::uuids::name_generator gen(fingerprint.named_uuid);
     std::string temp_string;