qt, rpc: Do not accept command while executing another one

src/qt/rpcconsole.cpp

@@ -949,6 +949,10 @@ void RPCConsole::on_lineEdit_returnPressed()
         return;
     }
 
+    if (m_is_executing) {
+        return;
+    }
+
     ui->lineEdit->clear();
 
 #ifdef ENABLE_WALLET
@@ -967,6 +971,7 @@ void RPCConsole::on_lineEdit_returnPressed()
     message(CMD_REQUEST, QString::fromStdString(strFilteredCmd));
     //: A console message indicating an entered command is currently being executed.
     message(CMD_REPLY, tr("Executing…"));
+    m_is_executing = true;
     Q_EMIT cmdRequest(cmd, m_last_wallet_model);
 
     cmd = QString::fromStdString(strFilteredCmd);
@@ -1018,6 +1023,7 @@ void RPCConsole::startExecutor()
         ui->messagesWidget->undo();
         message(category, command);
         scrollToEnd();
+        m_is_executing = false;
     });
 
     // Requests from this object must go to executor

src/qt/rpcconsole.h

@@ -166,6 +166,7 @@ private:
     QCompleter *autoCompleter = nullptr;
     QThread thread;
     WalletModel* m_last_wallet_model{nullptr};
+    bool m_is_executing{false};
 
     /** Update UI with latest network info from model. */
     void updateNetworkState();