address rightward drift

parity/migration.rs

@@ -203,7 +203,8 @@ fn migrate_database(version: u32, db_path: PathBuf, mut migrations: MigrationMan
 
 	// completely in-place migration leads to the paths being equal.
 	// in that case, no need to shuffle directories.
-	if temp_path != db_path {
+	if temp_path == db_path { return Ok(()) }
+
 	// create backup
 	fs::rename(&db_path, &backup_path)?;
 
@@ -215,10 +216,7 @@ fn migrate_database(version: u32, db_path: PathBuf, mut migrations: MigrationMan
 	}
 
 	// remove backup
-		fs::remove_dir_all(&backup_path)?;
-	}
-
-	Ok(())
+	fs::remove_dir_all(&backup_path).map_err(Into::into)
 }
 
 fn exists(path: &Path) -> bool {