Wizard: Harden 'Help' against std::out_of_range

1 files changed, 13 insertions, 0 deletions

diff --git a/horizonwizard.cc b/horizonwizard.cc
index 75a5e8c..53b40b5 100644
--- a/horizonwizard.cc
+++ b/horizonwizard.cc
@@ -1,7 +1,9 @@
 #include "horizonwizard.hh"
 #include "horizonhelpwindow.hh"
 
+#include <QDebug>
 #include <QFile>
+#include <QMessageBox>
 #include <map>
 #include <string>
 
@@ -50,6 +52,17 @@ HorizonWizard::HorizonWizard(QWidget *parent) : QWizard(parent)
 
         QObject::connect(this, (void (QWizard:: *)(void))&QWizard::helpRequested,
                          [=](void) {
+                if(help_id_map.find(currentId()) == help_id_map.end())
+                {
+                        qDebug() << "no help available for " << currentId();
+                        QMessageBox nohelp(QMessageBox::Warning,
+                                           tr("No Help Available"),
+                                           tr("Help is not available for the current page.  Consult the Installation Guide for more information."),
+                                           QMessageBox::Ok,
+                                           this);
+                        nohelp.exec();
+                        return;
+                }
                 string helppath = ":/wizard_help/resources/" +
                                   help_id_map.at(currentId()) + "-help.txt";
                 QFile helpfile(helppath.c_str());