Fix random crash

.gitignore

@@ -3,6 +3,7 @@ debug/
 release/
 x64/
 artifacts/
+docs/website/public
 .vscode/
 res/libsodium.a
 res/libsodium/libsodium*
@@ -29,4 +30,4 @@ workspace.code-workspace
 .DS_Store
 *.mak
 *.plist
-zcashd
+zcashd

src/websockets.cpp

@@ -141,7 +141,7 @@ void WormholeClient::onConnected()
     // will timeout after 5 minutes
     timer = new QTimer(parent);
     QObject::connect(timer, &QTimer::timeout, [=]() {
-        if (m_webSocket->isValid()) {
+        if (!shuttingDown && m_webSocket->isValid()) {
             auto payload = QJsonDocument(QJsonObject {
                 {"ping", "ping"}
             }).toJson();