fixes

src/logic/scripting/lua/libs/libapp.cpp

@@ -4,12 +4,16 @@
 #include "io/devices/MemoryDevice.hpp"
 
 static int l_create_memory_device(lua::State* L) {
-    auto name = lua::require_string(L, 1);
+    std::string name = lua::require_string(L, 1);
     if (io::get_device(name)) {
         throw std::runtime_error(
-            "entry-point '" + std::string(name) + "' is already used"
+            "entry-point '" + name + "' is already used"
         );
     }
+    if (name.find(':') != std::string::npos) {
+        throw std::runtime_error("invalid entry point name");
+    }
+    
     io::set_device(name, std::make_unique<io::MemoryDevice>());
     return 0;
 }