f Use OnceCell for MINER_LOCK

Author: tnull

lightning-transaction-sync/src/tests.rs

@@ -22,7 +22,7 @@ use std::collections::{HashMap, HashSet};
 static BITCOIND: OnceCell<BitcoinD> = OnceCell::new();
 static ELECTRSD: OnceCell<ElectrsD> = OnceCell::new();
 static PREMINE: OnceCell<()> = OnceCell::new();
-static MINER_LOCK: Mutex<()> = Mutex::new(());
+static MINER_LOCK: OnceCell<Mutex<()>> = OnceCell::new();
 
 fn get_bitcoind() -> &'static BitcoinD {
 	BITCOIND.get_or_init(|| {
@@ -51,7 +51,8 @@ fn get_electrsd() -> &'static ElectrsD {
 }
 
 fn generate_blocks_and_wait(num: usize) {
-	let _miner = MINER_LOCK.lock().unwrap();
+	let miner_lock = MINER_LOCK.get_or_init(|| Mutex::new(()));
+	let _miner = miner_lock.lock().unwrap();
 	let cur_height = get_bitcoind().client.get_block_count().unwrap();
 	let address = get_bitcoind().client.get_new_address(Some("test"), Some(AddressType::Legacy)).unwrap();
 	let _block_hashes = get_bitcoind().client.generate_to_address(num as u64, &address).unwrap();