checks e.args[0] exists before accessing it

chia/full_node/mempool_manager.py

@@ -283,8 +283,11 @@ async def pre_validate_spendbundle(
                 self.peak.height,
             )
         except Exception as e:  # take returned TypeError and turn into ValidationError class by
-            error = Err(e.args[0])
-            raise ValidationError(error)
+            if len(e.args) > 0:
+                error = Err(e.args[0])
+                raise ValidationError(error)
+            else:
+                raise ValidationError
         finally:
             self._worker_queue_size -= 1
 

chia/types/eligible_coin_spends.py

@@ -342,7 +342,12 @@ async def process_fast_forward_spends(
             )
         except TypeError as e:
             error = Err(e.args[0])
-            raise ValueError(f"Mempool item became invalid after singleton fast forward with error {error}.")
+            if len(e.args) > 0:
+                error = Err(e.args[0])
+                raise ValueError(f"Mempool item became invalid after singleton fast forward with error {error}.")
+            else:
+                raise ValueError(f"Mempool item became invalid after singleton fast forward with an unspecified error.")
+
         # Update bundle_coin_spends using the collected data
         for coin_id in replaced_coin_ids:
             mempool_item.bundle_coin_spends.pop(coin_id, None)