// src/gui/dialogs/qwizard.cpp
// Proposed fix indicated by "+" in front of proposed lines.
 void QWizardPrivate::_q_handleFieldObjectDestroyed(QObject *object)
 {
+    int destroyed_index = -1;
     QVector<QWizardField>::iterator it = fields.begin();
     while (it != fields.end()) {
         const QWizardField &field = *it;
         if (field.object == object) {
+            destroyed_index = fieldIndexMap.value(field.name, -1);
             fieldIndexMap.remove(field.name);
             it = fields.erase(it);
         } else {
             ++it;
         }
     }
+    if (destroyed_index != -1) {
+        QMap<QString, int>::iterator it2 = fieldIndexMap.begin();
+        while (it2 != fieldIndexMap.end()) {
+            int index = it2.value();
+            QString field_name = it2.key();
+            if (index > destroyed_index) {
+                fieldIndexMap.insert(field_name, index-1);
+            }
+            ++it2;
+        }
+    }
 }