3 files changed, 27 insertions, 10 deletions
diff --git a/src/testlib/qabstractitemmodeltester.cpp b/src/testlib/qabstractitemmodeltester.cpp
index e970be2c8d..fc6f696ecd 100644
--- a/src/testlib/qabstractitemmodeltester.cpp
+++ b/src/testlib/qabstractitemmodeltester.cpp
@@ -322,9 +322,10 @@ void QAbstractItemModelTesterPrivate::nonDestructiveBasicTest()
     Qt::ItemFlags flags = model->flags(QModelIndex());
     MODELTESTER_VERIFY(flags == Qt::ItemIsDropEnabled || flags == 0);
     model->hasChildren(QModelIndex());
-    model->hasIndex(0, 0);
+    const bool hasRow = model->hasIndex(0, 0);
     QVariant cache;
-    model->match(QModelIndex(), -1, cache);
+    if (hasRow)
+        model->match(model->index(0, 0), -1, cache);
     model->mimeTypes();
     MODELTESTER_VERIFY(!model->parent(QModelIndex()).isValid());
     MODELTESTER_VERIFY(model->rowCount() >= 0);
@@ -712,8 +713,17 @@ void QAbstractItemModelTesterPrivate::rowsAboutToBeRemoved(const QModelIndex &pa
     Changing c;
     c.parent = parent;
     c.oldSize = model->rowCount(parent);
-    c.last = model->data(model->index(start - 1, 0, parent));
-    c.next = model->data(model->index(end + 1, 0, parent));
+    if (start > 0) {
+        const QModelIndex startIndex = model->index(start - 1, 0, parent);
+        MODELTESTER_VERIFY(startIndex.isValid());
+        c.last = model->data(startIndex);
+    }
+    if (end < c.oldSize - 1) {
+        const QModelIndex endIndex = model->index(end + 1, 0, parent);
+        MODELTESTER_VERIFY(endIndex.isValid());
+        c.next = model->data(endIndex);
+    }
+
     remove.push(c);
 }
 
@@ -732,8 +742,10 @@ void QAbstractItemModelTesterPrivate::rowsRemoved(const QModelIndex &parent, int
     Changing c = remove.pop();
     MODELTESTER_COMPARE(parent, c.parent);
     MODELTESTER_COMPARE(model->rowCount(parent), c.oldSize - (end - start + 1));
-    MODELTESTER_COMPARE(model->data(model->index(start - 1, 0, c.parent)), c.last);
-    MODELTESTER_COMPARE(model->data(model->index(start, 0, c.parent)), c.next);
+    if (start > 0)
+        MODELTESTER_COMPARE(model->data(model->index(start - 1, 0, c.parent)), c.last);
+    if (end < c.oldSize - 1)
+        MODELTESTER_COMPARE(model->data(model->index(start, 0, c.parent)), c.next);
 }
 
 void QAbstractItemModelTesterPrivate::dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight)
diff --git a/src/testlib/qabstractitemmodeltester.h b/src/testlib/qabstractitemmodeltester.h
index 07bc170a7a..757074c6ae 100644
--- a/src/testlib/qabstractitemmodeltester.h
+++ b/src/testlib/qabstractitemmodeltester.h
@@ -42,6 +42,8 @@
 
 #include <QtCore/QObject>
 #include <QtTest/qttestglobal.h>
+#include <QtCore/QAbstractItemModel>
+#include <QtCore/QVariant>
 
 #ifdef QT_GUI_LIB
 #include <QtGui/QFont>
diff --git a/src/testlib/qtestcase.cpp b/src/testlib/qtestcase.cpp
index 469c423109..7a74afce91 100644
--- a/src/testlib/qtestcase.cpp
+++ b/src/testlib/qtestcase.cpp
@@ -1634,8 +1634,10 @@ DebugSymbolResolver::DebugSymbolResolver(HANDLE process)
     bool success = false;
     m_dbgHelpLib = LoadLibraryW(L"dbghelp.dll");
     if (m_dbgHelpLib) {
-        SymInitializeType symInitialize = (SymInitializeType)(GetProcAddress(m_dbgHelpLib, "SymInitialize"));
-        m_symFromAddr = (SymFromAddrType)(GetProcAddress(m_dbgHelpLib, "SymFromAddr"));
+        SymInitializeType symInitialize = reinterpret_cast<SymInitializeType>(
+            reinterpret_cast<QFunctionPointer>(GetProcAddress(m_dbgHelpLib, "SymInitialize")));
+        m_symFromAddr = reinterpret_cast<SymFromAddrType>(
+            reinterpret_cast<QFunctionPointer>(GetProcAddress(m_dbgHelpLib, "SymFromAddr")));
         success = symInitialize && m_symFromAddr && symInitialize(process, NULL, TRUE);
     }
     if (!success)
@@ -2166,8 +2168,9 @@ QString QTest::qFindTestData(const QString& base, const char *file, int line, co
             srcdir.setFile(QFile::decodeName(builddir) + QLatin1String("/") + srcdir.filePath());
         }
 
-        QString candidate = QString::fromLatin1("%1/%2").arg(srcdir.canonicalFilePath(), base);
-        if (QFileInfo::exists(candidate)) {
+        const QString canonicalPath = srcdir.canonicalFilePath();
+        QString candidate = QString::fromLatin1("%1/%2").arg(canonicalPath, base);
+        if (!canonicalPath.isEmpty() && QFileInfo::exists(candidate)) {
             found = candidate;
         }
         else if (QTestLog::verboseLevel() >= 2) {