Prevented infinite loop in QMoviePrivate::next().

If we're unable to read the first frame, we shouldn't return an end
marker, as that will cause QMoviePrivate::next() to recurse
indefinitely when the playCounter is set to -1 (infinite).

Reviewed-by: Olivier Goffart

5 files changed, 24 insertions, 1 deletions

diff --git a/src/gui/image/qmovie.cpp b/src/gui/image/qmovie.cpp
index 911a2b5..eb139fa 100644
--- a/src/gui/image/qmovie.cpp
+++ b/src/gui/image/qmovie.cpp
@@ -381,10 +381,14 @@ QFrameInfo QMoviePrivate::infoForFrame(int frameNumber)
             QPixmap aPixmap = QPixmap::fromImage(anImage);
             int aDelay = reader->nextImageDelay();
             return QFrameInfo(aPixmap, aDelay);
-        } else {
+        } else if (frameNumber != 0) {
             // We've read all frames now. Return an end marker
             haveReadAll = true;
             return QFrameInfo::endMarker();
+        } else {
+            // No readable frames
+            haveReadAll = true;
+            return QFrameInfo();
         }
     }
 
diff --git a/tests/auto/qmovie/animations/corrupt.gif b/tests/auto/qmovie/animations/corrupt.gif
new file mode 100644
index 0000000..c1545eb
--- /dev/null
+++ b/tests/auto/qmovie/animations/corrupt.gif
diff --git a/tests/auto/qmovie/qmovie.pro b/tests/auto/qmovie/qmovie.pro
index 6973955..855eb9e 100644
--- a/tests/auto/qmovie/qmovie.pro
+++ b/tests/auto/qmovie/qmovie.pro
@@ -12,6 +12,7 @@ wince*: {
    DEPLOYMENT += addFiles
 }
 
+RESOURCES += resources.qrc
 
 symbian: {
    addFiles.files = animations\\*
diff --git a/tests/auto/qmovie/resources.qrc b/tests/auto/qmovie/resources.qrc
new file mode 100644
index 0000000..ce459a0
--- /dev/null
+++ b/tests/auto/qmovie/resources.qrc
@@ -0,0 +1,5 @@
+<!DOCTYPE RCC><RCC version="1.0">
+<qresource>
+    <file>animations/corrupt.gif</file>
+</qresource>
+</RCC>
diff --git a/tests/auto/qmovie/tst_qmovie.cpp b/tests/auto/qmovie/tst_qmovie.cpp
index 80a551b..d43d4cb 100644
--- a/tests/auto/qmovie/tst_qmovie.cpp
+++ b/tests/auto/qmovie/tst_qmovie.cpp
@@ -72,6 +72,7 @@ private slots:
     void jumpToFrame_data();
     void jumpToFrame();
     void changeMovieFile();
+    void infiniteLoop();
 };
 
 // Testing get/set functions
@@ -208,5 +209,17 @@ void tst_QMovie::changeMovieFile()
     QVERIFY(movie.currentFrameNumber() == -1);
 }
 
+void tst_QMovie::infiniteLoop()
+{
+    QLabel label;
+    label.show();
+    QMovie *movie = new QMovie(QLatin1String(":animations/corrupt.gif"), QByteArray(), &label);
+    label.setMovie(movie);
+    movie->start();
+
+    QTestEventLoop::instance().enterLoop(1);
+    QTestEventLoop::instance().timeout();
+}
+
 QTEST_MAIN(tst_QMovie)
 #include "tst_qmovie.moc"