LIB: Uuid check, but should never fail

src/Lib/CRTPStore.hh

@@ -37,6 +37,10 @@ public:
     {
         auto ret      = std::make_shared<Document>(file);
         const Uuid id = ret->getUuid();
+
+        if (documents.count(id) >= 1)
+            throw std::runtime_error("Document already loaded");
+
         documents[id] = ret;
         return ret;
     }