From b05bfecb5f5a9f90fbca7432699600d6c9f14765 Mon Sep 17 00:00:00 2001
From: Bill Somerville <bill@classdesign.com>
Date: Fri, 31 Jul 2020 12:39:08 +0100
Subject: [PATCH] Avoid arithmetic errors when parsing the round-robin current
 text

---
 widgets/mainwindow.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/widgets/mainwindow.cpp b/widgets/mainwindow.cpp
index 8536773ff..7055d3e30 100644
--- a/widgets/mainwindow.cpp
+++ b/widgets/mainwindow.cpp
@@ -8039,8 +8039,11 @@ void MainWindow::WSPR_scheduling ()
 {
   QString t=ui->RoundRobin->currentText();
   if(m_mode=="FST4W" and t!="Random") {
-    int i=t.left (1).toInt () - 1;
-    int n=t.right(1).toInt();
+    bool ok;
+    int i=t.left (1).toInt (&ok) - 1;
+    if (!ok) return;
+    int n=t.right (1).toInt (&ok);
+    if (!ok || 0 == n) return;
 
     qint64 ms = QDateTime::currentMSecsSinceEpoch() % 86400000;
     int nsec=ms/1000;