Merge #12477: test: Plug memory leaks and stack-use-after-scope

fadb39c test: Plug memory leaks and stack-use-after-scope (MarcoFalke)

Pull request description:

Tree-SHA512: 7bd6bbba43c7870bbd9732d73ecfc520f21701168e6fb4ad099a08ea5b21d9cd09215e70d22fb92a1af03993204ef89ad74b3e80d9fa5a10831c3e7cf2dd04cd

src/bench/coin_selection.cpp

@@ -37,11 +37,6 @@ static void CoinSelection(benchmark::State& state)
     LOCK(wallet.cs_wallet);
 
     while (state.KeepRunning()) {
-        // Empty wallet.
-        for (COutput output : vCoins)
-            delete output.tx;
-        vCoins.clear();
-
         // Add coins.
         for (int i = 0; i < 1000; i++)
             addCoin(1000 * COIN, wallet, vCoins);
@@ -53,6 +48,12 @@ static void CoinSelection(benchmark::State& state)
         assert(success);
         assert(nValueRet == 1003 * COIN);
         assert(setCoinsRet.size() == 2);
+
+        // Empty wallet.
+        for (COutput& output : vCoins) {
+            delete output.tx;
+        }
+        vCoins.clear();
     }
 }
 

src/test/checkqueue_tests.cpp

@@ -406,11 +406,11 @@ BOOST_AUTO_TEST_CASE(test_CheckQueueControl_Locks)
         boost::thread_group tg;
         std::mutex m;
         std::condition_variable cv;
-        {
         bool has_lock{false};
         bool has_tried{false};
         bool done{false};
         bool done_ack{false};
+        {
             std::unique_lock<std::mutex> l(m);
             tg.create_thread([&]{
                     CCheckQueueControl<FakeCheck> control(queue.get());

src/test/test_bitcoin.cpp

@@ -28,6 +28,9 @@ void CConnmanTest::AddNode(CNode& node)
 void CConnmanTest::ClearNodes()
 {
     LOCK(g_connman->cs_vNodes);
+    for (CNode* node : g_connman->vNodes) {
+        delete node;
+    }
     g_connman->vNodes.clear();
 }