validation: avoid passing large struct in Err

validation/src/check.rs

@@ -432,7 +432,7 @@ impl<'a> ModelInfo<'a>{
 }
 
 impl MapCheck<'_>{
-	fn pass(self)->Result<MapInfoOwned,Self>{
+	fn result(self)->Result<MapInfoOwned,String>{
 		match self{
 			MapCheck{
 				model_class:StringCheck(Ok(())),
@@ -456,7 +456,7 @@ impl MapCheck<'_>{
 					game_id,
 				})
 			},
-			other=>Err(other),
+			other=>Err(other.to_string()),
 		}
 	}
 }
@@ -638,7 +638,7 @@ impl crate::message_handler::MessageHandler{
 		let map_check=model_info.check();
 
 		// check the report, generate an error message if it fails the check
-		let status=map_check.pass().map_err(|e|e.to_string());
+		let status=map_check.result();
 
 		Ok(CheckReportAndVersion{status,version})
 	}