diff --git a/config.tests/unix/compile.test b/config.tests/unix/compile.test
index 103321e451..65bc874617 100755
--- a/config.tests/unix/compile.test
+++ b/config.tests/unix/compile.test
@@ -67,7 +67,7 @@ test -r Makefile && $MAKE distclean >/dev/null 2>&1
 # Make sure output from possible previous tests is gone
 rm -f "$EXE" "${EXE}.exe"
 
-set -- "$OUTDIR/bin/qmake" -nocache -spec "$QMKSPEC" "CONFIG+=$QMAKE_CONFIG" "CONFIG+=android_app" "CONFIG-=debug_and_release app_bundle lib_bundle" "LIBS*=$LFLAGS" "LIBS+=$MAC_ARCH_LFLAGS" "INCLUDEPATH*=$INCLUDEPATH" "QMAKE_CXXFLAGS*=$CXXFLAGS" "QMAKE_CXXFLAGS+=$MAC_ARCH_CXXFLAGS" "$SRCDIR/$TEST/$EXE.pro" -o "$OUTDIR/$TEST/Makefile"
+set -- "$OUTDIR/bin/qmake" -nocache -spec "$QMKSPEC" "CONFIG+=$QMAKE_CONFIG" "CONFIG+=android_app" "CONFIG-=debug_and_release app_bundle lib_bundle" "LIBS+=$LFLAGS" "LIBS+=$MAC_ARCH_LFLAGS" "INCLUDEPATH*=$INCLUDEPATH" "QMAKE_CXXFLAGS*=$CXXFLAGS" "QMAKE_CXXFLAGS+=$MAC_ARCH_CXXFLAGS" "$SRCDIR/$TEST/$EXE.pro" -o "$OUTDIR/$TEST/Makefile"
 if [ "$VERBOSE" = "yes" ]; then
     OUTDIR=$OUTDIR "$@" && $MAKE && SUCCESS=yes
 else
diff --git a/src/corelib/thread/qfutureinterface.cpp b/src/corelib/thread/qfutureinterface.cpp
index 05c4371a58..60155c96fd 100644
--- a/src/corelib/thread/qfutureinterface.cpp
+++ b/src/corelib/thread/qfutureinterface.cpp
@@ -193,16 +193,19 @@ void QFutureInterfaceBase::waitForResume()
 
 int QFutureInterfaceBase::progressValue() const
 {
+    const QMutexLocker lock(&d->m_mutex);
     return d->m_progressValue;
 }
 
 int QFutureInterfaceBase::progressMinimum() const
 {
+    const QMutexLocker lock(&d->m_mutex);
     return d->m_progressMinimum;
 }
 
 int QFutureInterfaceBase::progressMaximum() const
 {
+    const QMutexLocker lock(&d->m_mutex);
     return d->m_progressMaximum;
 }
 
diff --git a/src/corelib/thread/qfutureinterface_p.h b/src/corelib/thread/qfutureinterface_p.h
index 2321ce8d72..e2d588cd07 100644
--- a/src/corelib/thread/qfutureinterface_p.h
+++ b/src/corelib/thread/qfutureinterface_p.h
@@ -146,18 +146,20 @@ public:
         QAtomicInt m_refCountT;
     };
 
+    // T: accessed from executing thread
+    // Q: accessed from the waiting/querying thread
     RefCount refCount;
     mutable QMutex m_mutex;
     QWaitCondition waitCondition;
     QList<QFutureCallOutInterface *> outputConnections;
-    int m_progressValue;
-    int m_progressMinimum;
-    int m_progressMaximum;
+    int m_progressValue; // TQ
+    int m_progressMinimum; // TQ
+    int m_progressMaximum; // TQ
     QFutureInterfaceBase::State state;
     QElapsedTimer progressTime;
     QWaitCondition pausedWaitCondition;
     QtPrivate::ResultStoreBase m_results;
-    bool manualProgress;
+    bool manualProgress; // only accessed from executing thread
     int m_expectedResultCount;
     QtPrivate::ExceptionStore m_exceptionStore;
     QString m_progressText;
diff --git a/tests/auto/sql/kernel/qsqldatabase/tst_qsqldatabase.cpp b/tests/auto/sql/kernel/qsqldatabase/tst_qsqldatabase.cpp
index 83cf0394f9..71a10c45d8 100644
--- a/tests/auto/sql/kernel/qsqldatabase/tst_qsqldatabase.cpp
+++ b/tests/auto/sql/kernel/qsqldatabase/tst_qsqldatabase.cpp
@@ -146,6 +146,7 @@ private slots:
     void mysql_multiselect();  // For task 144331
     void mysql_savepointtest_data() { generic_data("QMYSQL"); }
     void mysql_savepointtest();
+    void mysql_connectWithInvalidAddress();
 
     void accessOdbc_strings_data() { generic_data(); }
     void accessOdbc_strings();
@@ -2192,6 +2193,14 @@ void tst_QSqlDatabase::mysql_savepointtest()
     QVERIFY_SQL(q, exec("savepoint foo"));
 }
 
+void tst_QSqlDatabase::mysql_connectWithInvalidAddress()
+{
+    // Ensure that giving invalid connection parameters fails correctly
+    QSqlDatabase db = QSqlDatabase::addDatabase("QMYSQL");
+    db.setHostName("invalid.local");
+    QCOMPARE(db.open(), false);
+}
+
 void tst_QSqlDatabase::oci_tables()
 {
     QSKIP("Requires specific permissions to create a system table");