Merge remote-tracking branch 'origin/4.7' into qt-4.8-from-4.7

Conflicts:
	doc/src/getting-started/installation.qdoc
	doc/src/platforms/platform-notes.qdoc
	src/corelib/tools/qlocale_symbian.cpp
	src/gui/kernel/qwidget_p.h
	src/network/access/qnetworkaccesshttpbackend.cpp
	src/opengl/qgl.cpp
	src/plugins/bearer/symbian/qnetworksession_impl.cpp

3 files changed, 22 insertions, 5 deletions

diff --git a/src/network/access/qhttpnetworkreply.cpp b/src/network/access/qhttpnetworkreply.cpp
index 1a02200..6173b39 100644
--- a/src/network/access/qhttpnetworkreply.cpp
+++ b/src/network/access/qhttpnetworkreply.cpp
@@ -891,7 +891,7 @@ bool QHttpNetworkReplyPrivate::expectContent()
         || statusCode == 204 || statusCode == 304)
         return false;
     if (request.operation() == QHttpNetworkRequest::Head)
-        return !shouldEmitSignals();
+        return false; // no body expected for HEAD request
     qint64 expectedContentLength = contentLength();
     if (expectedContentLength == 0)
         return false;
diff --git a/src/network/access/qnetworkreplyimpl.cpp b/src/network/access/qnetworkreplyimpl.cpp
index 0b568d4..6f2daec 100644
--- a/src/network/access/qnetworkreplyimpl.cpp
+++ b/src/network/access/qnetworkreplyimpl.cpp
@@ -471,6 +471,7 @@ bool QNetworkReplyImplPrivate::isCachingEnabled() const
 
 void QNetworkReplyImplPrivate::setCachingEnabled(bool enable)
 {
+    Q_Q(QNetworkReplyImpl);
     if (!enable && !cacheEnabled)
         return;                 // nothing to do
     if (enable && cacheEnabled)
@@ -493,15 +494,27 @@ void QNetworkReplyImplPrivate::setCachingEnabled(bool enable)
         networkCache()->remove(url);
         cacheSaveDevice = 0;
         cacheEnabled = false;
+        QObject::disconnect(networkCache(), SIGNAL(destroyed()), q, SLOT(_q_cacheDestroyed()));
     }
 }
 
+void QNetworkReplyImplPrivate::_q_cacheDestroyed()
+{
+    //destruction of cache invalidates cacheSaveDevice
+    cacheSaveDevice = 0;
+    cacheEnabled = false;
+}
+
 void QNetworkReplyImplPrivate::completeCacheSave()
 {
-    if (cacheEnabled && errorCode != QNetworkReplyImpl::NoError) {
-        networkCache()->remove(url);
-    } else if (cacheEnabled && cacheSaveDevice) {
-        networkCache()->insert(cacheSaveDevice);
+    Q_Q(QNetworkReplyImpl);
+    if (cacheEnabled) {
+        if (errorCode != QNetworkReplyImpl::NoError) {
+            networkCache()->remove(url);
+        } else if (cacheSaveDevice) {
+            networkCache()->insert(cacheSaveDevice);
+        }
+        QObject::disconnect(networkCache(), SIGNAL(destroyed()), q, SLOT(_q_cacheDestroyed()));
     }
     cacheSaveDevice = 0;
     cacheEnabled = false;
@@ -561,6 +574,8 @@ void QNetworkReplyImplPrivate::initCacheSaveDevice()
         networkCache()->remove(url);
         cacheSaveDevice = 0;
         cacheEnabled = false;
+    } else {
+        q->connect(networkCache(), SIGNAL(destroyed()), SLOT(_q_cacheDestroyed()));
     }
 }
 
diff --git a/src/network/access/qnetworkreplyimpl_p.h b/src/network/access/qnetworkreplyimpl_p.h
index 089c87e..286d8ea 100644
--- a/src/network/access/qnetworkreplyimpl_p.h
+++ b/src/network/access/qnetworkreplyimpl_p.h
@@ -104,6 +104,7 @@ public:
     Q_PRIVATE_SLOT(d_func(), void _q_networkSessionConnected())
     Q_PRIVATE_SLOT(d_func(), void _q_networkSessionFailed())
 #endif
+    Q_PRIVATE_SLOT(d_func(), void _q_cacheDestroyed())
 };
 
 class QNetworkReplyImplPrivate: public QNetworkReplyPrivate
@@ -140,6 +141,7 @@ public:
     void _q_networkSessionConnected();
     void _q_networkSessionFailed();
 #endif
+    void _q_cacheDestroyed();
 
     void setup(QNetworkAccessManager::Operation op, const QNetworkRequest &request,
                QIODevice *outgoingData);