TestValidator now implements Drop, no need to close() it

validator/src/bin/solana-test-validator.rs

@@ -206,6 +206,7 @@ fn main() {
         TestValidator::start(
             &ledger_path,
             TestValidatorStartConfig {
+                preserve_ledger: true,
                 rpc_config: JsonRpcConfig {
                     enable_validator_exit: true,
                     enable_rpc_transaction_history: true,

validator/src/main.rs

@@ -1740,6 +1740,6 @@ pub fn main() {
         });
     }
     info!("Validator initialized");
-    validator.join().expect("validator exit");
+    validator.join();
     info!("Validator exiting..");
 }