fix fatal error when skeleton is missing

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

@@ -36,6 +36,9 @@ static rigging::Skeleton* get_skeleton(lua::State* L) {
 
 static int l_get_model(lua::State* L) {
     if (auto skeleton = get_skeleton(L)) {
+        if (skeleton->config == nullptr) {
+            return 0;
+        }
         auto& rigConfig = *skeleton->config;
         auto index = index_range_check(*skeleton, lua::tointeger(L, 2));
         const auto& modelOverride = skeleton->modelOverrides[index];
@@ -96,6 +99,9 @@ static int l_set_texture(lua::State* L) {
 
 static int l_index(lua::State* L) {
     if (auto skeleton = get_skeleton(L)) {
+        if (skeleton->config == nullptr) {
+            return 0;
+        }
         if (auto bone = skeleton->config->find(lua::require_string(L, 2))) {
             return lua::pushinteger(L, bone->getIndex());
         }

src/objects/Entities.cpp

@@ -147,7 +147,7 @@ void Entities::loadEntity(const dv::value& map, Entity entity) {
     if (map.has(COMP_TRANSFORM)) {
         transform.deserialize(map[COMP_TRANSFORM]);
     }
-    if (skeleton == nullptr) {
+    if (skeleton == nullptr || skeleton->config == nullptr) {
         return;
     }
     std::string skeletonName = skeleton->config->getName();
@@ -397,6 +397,9 @@ void Entities::renderDebug(
         ctx.setLineWidth(2);
         for (auto [entity, transform, skeleton] : view.each()) {
             auto config = skeleton.config;
+            if (config == nullptr) {
+                continue;
+            }
             const auto& pos = transform.pos;
             const auto& size = transform.size;
             if (frustum && !frustum->isBoxVisible(pos - size, pos + size)) {
@@ -434,9 +437,11 @@ void Entities::render(
         }
 
         const auto* rigConfig = skeleton.config;
-        rigConfig->render(
-            assets, batch, skeleton, transform.rot, pos, size
-        );
+        if (rigConfig) {
+            rigConfig->render(
+                assets, batch, skeleton, transform.rot, pos, size
+            );
+        }
     }
 }
 

src/objects/Entity.cpp

@@ -64,7 +64,7 @@ dv::value Entity::serialize() const {
     root[COMP_RIGIDBODY] =
         rigidbody.serialize(def.save.body.velocity, def.save.body.settings);
 
-    if (skeleton != nullptr) {
+    if (skeleton != nullptr && skeleton->config != nullptr) {
         if (skeleton->config->getName() != def.skeletonName) {
             root["skeleton-name"] = skeleton->config->getName();
         }