X-Git-Url: https://git.quassel-irc.org/?p=quassel.git;a=blobdiff_plain;f=src%2Fuisupport%2Fbufferview.cpp;h=3a2be71a7cb0f759ede2d74bcd5b2dc9e0e3c54c;hp=a17c1a0d19ce24b4c5bcddc7a17ee1b38d6f9354;hb=a700bd999215313b075ced5a1e3ba4ea8917fbbc;hpb=cc6e7c08709c4e761e2fd9c2e322751015497003

diff --git a/src/uisupport/bufferview.cpp b/src/uisupport/bufferview.cpp
index a17c1a0d..3a2be71a 100644
--- a/src/uisupport/bufferview.cpp
+++ b/src/uisupport/bufferview.cpp
@@ -1,5 +1,5 @@
 /***************************************************************************
- *   Copyright (C) 2005-2019 by the Quassel Project                        *
+ *   Copyright (C) 2005-2020 by the Quassel Project                        *
  *   devel@quassel-irc.org                                                 *
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
@@ -493,14 +493,18 @@ void BufferView::changeBuffer(Direction direction)
             QModelIndex newParent = currentIndex.sibling(currentIndex.row() - 1, 0);
             if (currentIndex.row() == 0)
                 newParent = lastNetIndex;
-            if (model()->hasChildren(newParent))
-                resultingIndex = newParent.child(model()->rowCount(newParent) - 1, 0);
+            if (model()->hasChildren(newParent)) {
+                // Treat an invalid QAbstractItemModel as an invalid QModelIndex
+                resultingIndex = (newParent.model() ? newParent.model()->index(model()->rowCount(newParent) - 1, 0, newParent) : QModelIndex());
+            }
             else
                 resultingIndex = newParent;
         }
         else {
-            if (model()->hasChildren(currentIndex))
-                resultingIndex = currentIndex.child(0, 0);
+            if (model()->hasChildren(currentIndex)) {
+                // Treat an invalid QAbstractItemModel as an invalid QModelIndex
+                resultingIndex = (currentIndex.model() ? currentIndex.model()->index(0, 0, currentIndex) : QModelIndex());
+            }
             else
                 resultingIndex = currentIndex.sibling(currentIndex.row() + 1, 0);
         }
@@ -509,8 +513,10 @@ void BufferView::changeBuffer(Direction direction)
     if (!resultingIndex.isValid()) {
         if (direction == Forward)
             resultingIndex = model()->index(0, 0, QModelIndex());
-        else
-            resultingIndex = lastNetIndex.child(model()->rowCount(lastNetIndex) - 1, 0);
+        else {
+            // Assume model is valid
+            resultingIndex = lastNetIndex.model()->index(model()->rowCount(lastNetIndex) - 1, 0, lastNetIndex);
+        }
     }
 
     selectionModel()->setCurrentIndex(resultingIndex, QItemSelectionModel::ClearAndSelect | QItemSelectionModel::Rows);
@@ -722,7 +728,7 @@ BufferViewDock::BufferViewDock(BufferViewConfig* config, QWidget* parent)
 void BufferViewDock::setLocked(bool locked)
 {
     if (locked) {
-        setFeatures(nullptr);
+        setFeatures({});
     }
     else {
         setFeatures(QDockWidget::DockWidgetClosable | QDockWidget::DockWidgetMovable | QDockWidget::DockWidgetFloatable);