Reenable missing experts error

Author: pwilkin

convert_hf_to_gguf.py

@@ -2891,6 +2891,15 @@ def modify_tensors(self, data_torch: Tensor, name: str, bid: int | None) -> Iter
                 return []
         return [(self.map_tensor_name(name), data_torch)]
 
+    def prepare_tensors(self):
+        super().prepare_tensors()
+
+        if self._experts is not None:
+            # flatten `list[dict[str, Tensor]]` into `list[str]`
+            experts = [k for d in self._experts for k in d.keys()]
+            if len(experts) > 0:
+                raise ValueError(f"Unprocessed experts: {experts}")
+
 
 @ModelBase.register(
     "Qwen2VLModel",