3 files changed, 9 insertions, 3 deletions
diff --git a/src/testlib/qabstractitemmodeltester.cpp b/src/testlib/qabstractitemmodeltester.cpp
index a85b291220..a2c643660a 100644
--- a/src/testlib/qabstractitemmodeltester.cpp
+++ b/src/testlib/qabstractitemmodeltester.cpp
@@ -720,12 +720,12 @@ void QAbstractItemModelTesterPrivate::rowsAboutToBeRemoved(const QModelIndex &pa
     Changing c;
     c.parent = parent;
     c.oldSize = model->rowCount(parent);
-    if (start > 0) {
+    if (start > 0 && model->columnCount(parent) > 0) {
         const QModelIndex startIndex = model->index(start - 1, 0, parent);
         MODELTESTER_VERIFY(startIndex.isValid());
         c.last = model->data(startIndex);
     }
-    if (end < c.oldSize - 1) {
+    if (end < c.oldSize - 1 && model->columnCount(parent) > 0) {
         const QModelIndex endIndex = model->index(end + 1, 0, parent);
         MODELTESTER_VERIFY(endIndex.isValid());
         c.next = model->data(endIndex);
diff --git a/src/testlib/qtestcase.cpp b/src/testlib/qtestcase.cpp
index 74507c11e1..979fd6e1d2 100644
--- a/src/testlib/qtestcase.cpp
+++ b/src/testlib/qtestcase.cpp
@@ -2798,6 +2798,11 @@ char *QTest::toString(const char *str)
 
 /*! \internal
  */
+char *QTest::toString(const volatile void *p) // Use volatile to match compare_ptr_helper()
+{
+    return QTest::toString(const_cast<const void *>(p));
+}
+
 char *QTest::toString(const void *p)
 {
     char *msg = new char[128];
diff --git a/src/testlib/qtestcase.h b/src/testlib/qtestcase.h
index e1518708e8..b5aea46689 100644
--- a/src/testlib/qtestcase.h
+++ b/src/testlib/qtestcase.h
@@ -283,7 +283,8 @@ namespace QTest
     Q_TESTLIB_EXPORT char *toPrettyCString(const char *unicode, int length);
     Q_TESTLIB_EXPORT char *toPrettyUnicode(QStringView string);
     Q_TESTLIB_EXPORT char *toString(const char *);
-    Q_TESTLIB_EXPORT char *toString(const void *);
+    Q_TESTLIB_EXPORT char *toString(const volatile void *);
+    Q_TESTLIB_EXPORT char *toString(const void *); // ### FIXME: Qt 7: Remove
 
     Q_TESTLIB_EXPORT void qInit(QObject *testObject, int argc = 0, char **argv = nullptr);
     Q_TESTLIB_EXPORT int qRun();