Create new rpc connection during shutdown if we don't have one and debug logging

src/controller.cpp

@@ -1987,6 +1987,11 @@ void Controller::refreshHUSHPrice()
 void Controller::shutdownhushd() 
 {
     // Save the wallet and exit the lightclient library cleanly.
+    if (!zrpc) {
+        zrpc = new LiteInterface();
+        qDebug() << __func__ << ": created new rpc connection zrpc=" << zrpc;
+    }
+
     if (zrpc && zrpc->haveConnection()) 
     {
         QDialog d(main);
@@ -2018,13 +2023,13 @@ void Controller::shutdownhushd()
             if (!finished)
                 d.accept();
             finished = true;
-            qDebug() << "saveWallet during shutdownhushd";
+            qDebug() << __func__ << ": saveWallet finished";
         });
 
         if (!finished)
             d.exec();
     } else {
-        qDebug() << "No zrpc object, unclean shutdown and unable to call saveWallet!";
+        qDebug() << __func__ << ": No zrpc object, unclean shutdown and unable to call saveWallet!";
     }
 }
 

src/mainwindow.cpp

@@ -434,8 +434,12 @@ void MainWindow::closeEvent(QCloseEvent* event) {
 
 void MainWindow::closeEventpw(QCloseEvent* event) {
     // Let the RPC know to shut down any running service.
-    qDebug() << __func__ << ": event=" << event;
+    qDebug() << __func__ << ": event=" << event << " this=" << this;
-    rpc->shutdownhushd();
+    if (rpc) {
+        rpc->shutdownhushd();
+    } else {
+        qDebug() << __func__ << ": invalid rpc object!";
+    }
 }
 
 void MainWindow::encryptWallet() {
@@ -444,6 +448,8 @@ void MainWindow::encryptWallet() {
     Ui_encryptionDialog ed;
     ed.setupUi(&d);
 
+    qDebug() << __func__ << ": start";
+
     // Handle edits on the password box
     
     auto fnPasswordEdited = [=](const QString&) {
@@ -500,6 +506,7 @@ void MainWindow::encryptWallet() {
                     QString("Please close some other programs to free up memory and try again"),
                     QMessageBox::Ok
                 ); 
+                qDebug() << __func__ << ": out of memory!";
                 exit(1);
         }
         QString passphraseHash1 = QByteArray(reinterpret_cast<const char*>(key), KEY_LEN).toHex();
@@ -520,6 +527,7 @@ void MainWindow::encryptWallet() {
                     QMessageBox::Ok
                 ); 
     }
+    qDebug() << __func__ << ": finish";
 }
 
 void MainWindow::removeWalletEncryption() {